# Intermodal Tank Transport — Hazardous Materials Safety Interpretation **Citation:** 21-0115 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2022-03-09 21-0115 response to Intermodal Tank Transport concerning 171.23, 172.101, 173.120. ## Document text <<>> 1200 New Jersey Avenue, SE Washington, DC 20590 U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration March 9, 2022 Jasmine Builes Intermodal Tank Transport 10720 West Sam Houston Parkway North Suite 250 Houston, TX 77064 Reference No. 21-0115 Dear Ms. Builes: This letter is in response to your December 7, 2021, email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to the use of NA identification (ID) numbers outside of the United States. Specifically, you ask about the international shipment of a specific diacetone alcohol material, which has a flashpoint above 140 °F and below 200 °F, making it subject to regulation in the United States as a combustible liquid, yet unregulated when shipped internationally by vessel, according to the International Maritime Dangerous Goods (IMDG) Code. Moreover, you state that this material was transported internationally with placards and labels using the ID number “NA1993”. You state that the shipper experienced frustration of shipment when transporting to Belgium because the material was described as a hazardous material. You seek confirmation that this specific diacetone alcohol material is regulated domestically within the United States and not regulated in accordance with the IMDG Code. Your understanding is correct. ID numbers preceded by the letters “NA”—such as “NA1993”— are associated with proper shipping names not recognized for transportation outside of the United States, and therefore, would not be recognized by international competent authorities such as those in Belgium. This material is classified as a “combustible liquid” subject to regulation under the HMR. <<>> The Dangerous Goods List of the IMDG Code, section 2.3.1.2, specifically excludes liquids with a flashpoint above 60 °C (140 °F) from the definition of a flammable liquid; therefore, this material is excepted from classification as a Class 3 hazardous material and is not subject to regulation under the IMDG Code. I hope this information is helpful. Please contact us if we can be of further assistance. Sincerely, Dirk Der Kinderen Chief, Standards Development Branch Standards and Rulemaking Division <<>> From: Patrick, Eamonn (PHMSA) To: Dodd, Alice (PHMSA) Subject: FW: Diacetone Alcohol (NA1993)- Conflict between 49CRF and IMDG Date: Thursday, December 30, 2021 8:24:19 AM Attachments: image001.png DAA-Diacetone Alcohol.pdf From: INFOCNTR (PHMSA) Sent: Friday, December 10, 2021 3:16 PM To: Dodd, Alice (PHMSA) Cc: Hazmat Interps Subject: FW: Diacetone Alcohol (NA1993)- Conflict between 49CRF and IMDG Hello Alice, Please see the below interpretation request. Should you have any questions, do not hesitate to reach out. Regards, -Breanna From: Jasmine Builes Sent: Tuesday, December 7, 2021 11:56 AM To: INFOCNTR (PHMSA) Subject: Diacetone Alcohol (NA1993)- Conflict between 49CRF and IMDG CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or open attachments unless you recognize the sender and know the content is safe. Dear Information Center, Can you please issue an official letter of interpretation regarding the “Non-Regulated” status of Diacetone Alcohol when shipping internationally? The SDS is attached for your reference. Background: We are shipping Diacetone Alcohol in 20’ isotanks (T11) from the United States to Belgium. Under 49CFR the product has been classified as a NA1993 but is not regulated under IMDG. To comply with 49CFR, the Supplier is placarding and labeling the tank as NA1993. Unfortunately, this is causing the <<>> Receiver to be fined by the Belgian Port Authorities since the cargo is NOT hazardous per IMDG. We are looking for a formal answer to resolve the conflict between 49CFR and IMDG. On December 3, 2021 @ 11:23AM, I spoke to Zach (Transportation Regulatory Specialist) at the Pipeline & Hazardous Material Safe Administration regarding our issue. He was unable to provide an answer at that time and advised that I would receive a call back by Tuesday (12/7/21). On December 7, 2021 @ 10:12AM, I followed up and spoke to Josh (Transportation Regulatory Specialist). Josh advised the cargo would not be regulated if shipped internationally since the product is classified as a “Combustible” and not an official class 3. In addition, the flash point is above 140F. A formal letter would be greatly appreciated. Best regards, Jasmine Builes 10720 West Sam Houston Parkway North Suite 250 Houston, Texas 77064 Office: +1 (281) 779-4882 Cell: +1 (312) 307-4778 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Date of issue: 03/23/2018 Revision date: 03/23/2018 Supersedes: 06/01/2015 SECTION 1: Identification 1.1. Identification Product form : Substance Trade name : Diacetone Alcohol CAS-No. : 123-42-2 Product code : HP-040747 FP Formula : C6H12O2 Synonyms : Diacetone / 4-Hydroxy-4-methyl pentan-2-one / 4-Hydroxy-4-methyl-2-pentanone / 4-Hydroxy- 4-methylpentanone-2 / Pentan-2-one, 4-hydroxy-4-methyl- / 2-Pentanone, 4-hydroxy-4-methyl- / 4-Hydroxy-4-methylpentan-2-one / DIACETONE ALCOHOL / 4-Hydroxy-4-methyl-pentane-2- on / 4-Hydroxy-4-methyl-2pentanone 1.2. Recommended use and restrictions on use Use of the substance/mixture : Solvent 1.3. Supplier Monument Chemical 16717 Jacintoport Blvd. Houston, TX 77015 - USA T (281) 452-5951 - F (281) 457-1127 sds@monumentchemical.com - www.monumentchemical.com 1.4. Emergency telephone number Emergency number : 24 HR CHEMTREC: 1-800-424-9300; 24 HR Emergency Assistance: 1-832-376-2026 SECTION 2: Hazard(s) identification 2.1. Classification of the substance or mixture GHS-US classification Flammable liquids Category 4 Serious eye damage/eye irritation Category 2A Specific target organ toxicity (single exposure) Category 3 Full text of H statements : see section 16 H227 Combustible liquid H319 Causes serious eye irritation H335 May cause respiratory irritation 2.2. GHS Label elements, including precautionary statements GHS-US labeling Hazard pictograms (GHS-US) : Signal word (GHS-US) : Warning Hazard statements (GHS-US) Precautionary statements (GHS-US) : H227 - Combustible liquid H319 - Causes serious eye irritation H335 - May cause respiratory irritation : P210 - Keep away from heat, hot surfaces, open flames, sparks. - No smoking. P261 - Avoid breathing dust/fume/gas/mist/vapors/spray. P264 - Wash hands thoroughly after handling. P271 - Use only outdoors or in a well-ventilated area. P280 - Wear eye protection, protective clothing, protective gloves. P304+P340 - If inhaled: Remove person to fresh air and keep comfortable for breathing P305+P351+P338 - If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P312 - Call a doctor, a POISON CENTER if you feel unwell P337+P313 - If eye irritation persists: Get medical advice/attention. P370+P378 - In case of fire: Use alcohol resistant foam, carbon dioxide (CO2), dry extinguishing powder, Water spray to extinguish. P403+P233 - Store in a well-ventilated place. Keep container tightly closed. 03/23/2018 EN (English US) Page 1 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations P403+P235 - Store in a well-ventilated place. Keep cool. P405 - Store locked up. P501 - Dispose of contents/container to hazardous or special waste collection point, in accordance with local, regional, national and/or international regulation 2.3. Other hazards which do not result in classification No additional information available 2.4. Unknown acute toxicity (GHS US) Not applicable SECTION 3: Composition/Information on ingredients 3.1. Substances Name Product identifier % Diacetone alcohol (Main constituent) (CAS-No.) 123-42-2 >= 99 Full text of hazard classes and H-statements : see section 16 3.2. Mixtures Not applicable SECTION 4: First-aid measures 4.1. Description of first aid measures First-aid measures general First-aid measures after inhalation First-aid measures after skin contact First-aid measures after eye contact First-aid measures after ingestion : Call a poison center/doctor/physician if you feel unwell. : Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor/physician if you feel unwell. : Wash skin with plenty of water. : Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. : Call a poison center/doctor/physician if you feel unwell. 4.2. Most important symptoms and effects (acute and delayed) Symptoms/effects after inhalation Symptoms/effects after eye contact : May cause respiratory irritation. : Eye irritation. 4.3. Immediate medical attention and special treatment, if necessary Treat symptomatically. SECTION 5: Fire-fighting measures 5.1. Suitable (and unsuitable) extinguishing media Suitable extinguishing media : Water spray. Dry powder. Foam. Carbon dioxide. 5.2. Specific hazards arising from the chemical Fire hazard : Combustible liquid. Reactivity : The product is non-reactive under normal conditions of use, storage and transport. 5.3. Special protective equipment and precautions for fire-fighters Protection during firefighting : Do not attempt to take action without suitable protective equipment. Self-contained breathing apparatus. Complete protective clothing. SECTION 6: Accidental release measures 6.1. Personal precautions, protective equipment and emergency procedures 6.1.1. For non-emergency personnel Emergency procedures : Ventilate spillage area. No open flames, no sparks, and no smoking. Avoid breathing dust/fume/gas/mist/vapors/spray. Avoid contact with skin and eyes. 6.1.2. For emergency responders Protective equipment : Do not attempt to take action without suitable protective equipment. For further information refer to section 8: "Exposure controls/personal protection". 6.2. Environmental precautions Avoid release to the environment. 03/23/2018 EN (English US) 2/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations 6.3. Methods and material for containment and cleaning up Methods for cleaning up Other information : Take up liquid spill into absorbent material. Notify authorities if product enters sewers or public waters. : Dispose of materials or solid residues at an authorized site. 6.4. Reference to other sections For further information refer to section 13. SECTION 7: Handling and storage 7.1. Precautions for safe handling Precautions for safe handling Hygiene measures : Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Wear personal protective equipment. Use only outdoors or in a well-ventilated area. Avoid breathing dust/fume/gas/mist/vapors/spray. Avoid contact with skin and eyes. : Do not eat, drink or smoke when using this product. Always wash hands after handling the product. 7.2. Conditions for safe storage, including any incompatibilities Storage conditions : Store in a well-ventilated place. Keep cool. Store locked up. Keep container tightly closed. SECTION 8: Exposure controls/personal protection 8.1. Control parameters Diacetone alcohol (123-42-2) ACGIH Local name Diacetone alcohol ACGIH ACGIH TWA (ppm) 50 ppm ACGIH Remark (ACGIH) URT & eye irr OSHA OSHA PEL (TWA) (mg/m³) 240 mg/m³ OSHA OSHA PEL (TWA) (ppm) 50 ppm IDLH US IDLH (ppm) 1800 ppm (10% LEL) NIOSH NIOSH REL (TWA) (mg/m³) 240 mg/m³ NIOSH NIOSH REL (TWA) (ppm) 50 ppm 8.2. Appropriate engineering controls Appropriate engineering controls Environmental exposure controls : Ensure good ventilation of the work station. : Avoid release to the environment. 8.3. Individual protection measures/Personal protective equipment Hand protection: Protective gloves Eye protection: Safety glasses Skin and body protection: Wear suitable protective clothing Respiratory protection: In case of insufficient ventilation, wear suitable respiratory equipment SECTION 9: Physical and chemical properties 9.1. Information on basic physical and chemical properties Physical state : Liquid Appearance : Colorless liquid. Turns yellow on aging. Color : Colorless, Yellow Odor : pleasant, Sweet Odor threshold : 0.3 ppm 03/23/2018 EN (English US) 3/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations pH : No data available Melting point : Not applicable Freezing point : -47 °C ; -52.6 °F Boiling point : 168 °C ; 334.4 °F Flash point : 61 - 65.6 °C ; 142 - 150°F closed cup Relative evaporation rate (butyl acetate=1) : No data available Flammability (solid, gas) : Not applicable. Vapor pressure : 0.97 mm Hg @20C Relative vapor density at 20 °C : 4 Relative density : 0.93 (at 25 °C) Specific gravity / density : 0.94 g/cm³ (at 20 °C) Molecular mass : 116.2 g/mol Solubility : Soluble in water. Log Pow : 1.03 Auto-ignition temperature : 640 °C ; 1184 °F Decomposition temperature : No data available Viscosity, kinematic : No data available Viscosity, dynamic : No data available Explosion limits : 1.8 - 6.9 vol % Explosive properties : No data available Oxidizing properties : No data available 9.2. Other information No additional information available SECTION 10: Stability and reactivity 10.1. Reactivity The product is non-reactive under normal conditions of use, storage and transport. 10.2. Chemical stability Stable under normal conditions. 10.3. Possibility of hazardous reactions No dangerous reactions known under normal conditions of use. 10.4. Conditions to avoid Avoid contact with hot surfaces. Heat. No flames, no sparks. Eliminate all sources of ignition. 10.5. Incompatible materials No additional information available 10.6. Hazardous decomposition products Under normal conditions of storage and use, hazardous decomposition products should not be produced. SECTION 11: Toxicological information 11.1. Information on toxicological effects Acute toxicity : Not classified Diacetone alcohol (123-42-2) LD50 oral rat > 4 g/kg LD50 dermal rat > 1875 mg/kg body weight (Equivalent or similar to OECD 402, 24 h, Rat, Male/female, Experimental value) Skin corrosion/irritation : Not classified Serious eye damage/irritation : Causes serious eye irritation. Respiratory or skin sensitization : Not classified Germ cell mutagenicity : Not classified Carcinogenicity : Not classified Reproductive toxicity : Not classified 03/23/2018 EN (English US) 4/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Specific target organ toxicity – single exposure : May cause respiratory irritation. Specific target organ toxicity – repeated exposure : Not classified Aspiration hazard : Not classified Symptoms/effects after inhalation Symptoms/effects after eye contact : May cause respiratory irritation. : Eye irritation. SECTION 12: Ecological information 12.1. Toxicity Ecology - general : The product is not considered harmful to aquatic organisms or to cause long-term adverse effects in the environment. Diacetone alcohol (123-42-2) LC50 fish 1 420 mg/l (Exposure time: 96 h - Species: Lepomis macrochirus [static]) LC50 fish 2 420 mg/l (Exposure time: 96 h - Species: Lepomis macrochirus) 12.2. Persistence and degradability No additional information available 12.3. Bioaccumulative potential Diacetone alcohol (123-42-2) Log Pow 1.03 12.4. Mobility in soil No additional information available 12.5. Other adverse effects No additional information available SECTION 13: Disposal considerations 13.1. Disposal methods Waste treatment methods : Dispose of contents/container in accordance with licensed collector’s sorting instructions. SECTION 14: Transport information Department of Transportation (DOT) In accordance with DOT Transport document description UN-No.(DOT) : NA1993 Proper Shipping Name (DOT) : NA1993 Combustible liquid, n.o.s. (Diacetone Alcohol), 3, III Class (DOT) Packing group (DOT) DOT Packaging Non Bulk (49 CFR 173.xxx) : 203 DOT Packaging Bulk (49 CFR 173.xxx) DOT Symbols DOT Special Provisions (49 CFR 172.102) : Combustible liquid, n.o.s. Diacetone Alcohol : 3 - Class 3 - Flammable and combustible liquid 49 CFR 173.120 : III - Minor Danger : 241 : D - Proper shipping name for domestic use only, or to and from Canada,G - Identifies PSN requiring a technical name : IB3 - Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 C (1.1 bar at 122 F), or 130 kPa at 55 C (1.3 bar at 131 F) are authorized, except for UN2672 (also see Special Provision IP8 in Table 2 for UN2672). T1 - 1.5 178.274(d)(2) Normal............. 178.275(d)(2) T4 - 2.65 178.274(d)(2) Normal............. 178.275(d)(3) TP1 - The maximum degree of filling must not exceed the degree of filling determined by the following: Degree of filling = 97 / 1 + a (tr - tf) Where: tr is the maximum mean bulk temperature during transport, and tf is the temperature in degrees celsius of the liquid during filling. DOT Packaging Exceptions (49 CFR 173.xxx) : 150 03/23/2018 EN (English US) 5/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations DOT Quantity Limitations Passenger aircraft/rail (49 CFR 173.27) DOT Quantity Limitations Cargo aircraft only (49 CFR 175.75) DOT Vessel Stowage Location : 60 L : 220 L Emergency Response Guide (ERG) Number : 128 Other information Transport by sea Not regulated Air transport Not regulated : A - The material may be stowed ‘‘on deck’’ or ‘‘under deck’’ on a cargo vessel and on a passenger vessel. : No supplementary information available. SECTION 15: Regulatory information 15.1. US Federal regulations Diacetone alcohol (123-42-2) Listed on the United States TSCA (Toxic Substances Control Act) inventory This product or mixture is not known to contain a toxic chemical or chemicals in excess of the applicable de minimis concentration as specified in 40 CFR §372.38(a) subject to the reporting requirements of section 313 of Title III of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR Part 372. 15.2. International regulations CANADA Diacetone alcohol (123-42-2) Listed on the Canadian DSL (Domestic Substances List) EU-Regulations Diacetone alcohol (123-42-2) Listed on the EEC inventory EINECS (European Inventory of Existing Commercial Chemical Substances) National regulations Diacetone alcohol (123-42-2) Listed on the AICS (Australian Inventory of Chemical Substances) Listed on IECSC (Inventory of Existing Chemical Substances Produced or Imported in China) Listed on the Japanese ENCS (Existing & New Chemical Substances) inventory Listed on the Japanese ISHL (Industrial Safety and Health Law) Listed on the Korean ECL (Existing Chemicals List) Listed on NZIoC (New Zealand Inventory of Chemicals) Listed on PICCS (Philippines Inventory of Chemicals and Chemical Substances) Listed on INSQ (Mexican National Inventory of Chemical Substances) Listed on CICR (Turkish Inventory and Control of Chemicals) Listed on the TCSI (Taiwan Chemical Substance Inventory) 15.3. US State regulations Diacetone alcohol (123-42-2) State or local regulations U.S. - Massachusetts - Right To Know List U.S. - New Jersey - Right to Know Hazardous Substance List U.S. - Pennsylvania - RTK (Right to Know) List SECTION 16: Other information Revision date : 03/23/2018 03/23/2018 EN (English US) 6/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Full text of H-phrases: H227 Combustible liquid H319 Causes serious eye irritation H335 May cause respiratory irritation SDS US (GHS HazCom 2012) DISCLAIMER: Monument Chemical believes that the information expressly set forth in this Safety Data Sheet (SDS) is accurate as of the date of publication. MONUMENT CHEMICAL EXPRESSLY DISCLAIMS ALL WARRANTIES OF EVERY KIND AND NATURE, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Unless indicated otherwise word for word on the safety data sheet, the information does not apply to substances/preparations/mixtures in purer form, mixed with other substances or in processes. The safety data sheet offers no quality specification for the substances/preparations/mixtures in question. Monument Chemical assumes no responsibility for any use of or reliance upon the data provided in this SDS. Given the variety of factors that can affect the use of the material, some of which are uniquely within the user’s knowledge and control, the user should independently evaluate (i) the completeness and accuracy of the information provided herein and (ii) the material to determine whether it is suitable and safe for the user’s intended use. Monument Chemical provides information in electronic form as a service to its customers. Due to the remote possibility that electronic transfer may have resulted in errors, omissions or alterations in this information, Monument Chemical makes no representations as to its completeness or accuracy. In addition, information obtained from a database may not be as current as the information in the SDS available directly from Monument Chemical. 03/23/2018 EN (English US) 7/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Date of issue: 03/23/2018 Revision date: 03/23/2018 Supersedes: 06/01/2015 SECTION 1: Identification 1.1. Identification Product form : Substance Trade name : Diacetone Alcohol CAS-No. : 123-42-2 Product code : HP-040747 FP Formula : C6H12O2 Synonyms : Diacetone / 4-Hydroxy-4-methyl pentan-2-one / 4-Hydroxy-4-methyl-2-pentanone / 4-Hydroxy- 4-methylpentanone-2 / Pentan-2-one, 4-hydroxy-4-methyl- / 2-Pentanone, 4-hydroxy-4-methyl- / 4-Hydroxy-4-methylpentan-2-one / DIACETONE ALCOHOL / 4-Hydroxy-4-methyl-pentane-2- on / 4-Hydroxy-4-methyl-2pentanone 1.2. Recommended use and restrictions on use Use of the substance/mixture : Solvent 1.3. Supplier Monument Chemical 16717 Jacintoport Blvd. Houston, TX 77015 - USA T (281) 452-5951 - F (281) 457-1127 sds@monumentchemical.com - www.monumentchemical.com 1.4. Emergency telephone number Emergency number : 24 HR CHEMTREC: 1-800-424-9300; 24 HR Emergency Assistance: 1-832-376-2026 SECTION 2: Hazard(s) identification 2.1. Classification of the substance or mixture GHS-US classification Flammable liquids Category 4 Serious eye damage/eye irritation Category 2A Specific target organ toxicity (single exposure) Category 3 Full text of H statements : see section 16 H227 Combustible liquid H319 Causes serious eye irritation H335 May cause respiratory irritation 2.2. GHS Label elements, including precautionary statements GHS-US labeling Hazard pictograms (GHS-US) : Signal word (GHS-US) : Warning Hazard statements (GHS-US) Precautionary statements (GHS-US) : H227 - Combustible liquid H319 - Causes serious eye irritation H335 - May cause respiratory irritation : P210 - Keep away from heat, hot surfaces, open flames, sparks. - No smoking. P261 - Avoid breathing dust/fume/gas/mist/vapors/spray. P264 - Wash hands thoroughly after handling. P271 - Use only outdoors or in a well-ventilated area. P280 - Wear eye protection, protective clothing, protective gloves. P304+P340 - If inhaled: Remove person to fresh air and keep comfortable for breathing P305+P351+P338 - If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P312 - Call a doctor, a POISON CENTER if you feel unwell P337+P313 - If eye irritation persists: Get medical advice/attention. P370+P378 - In case of fire: Use alcohol resistant foam, carbon dioxide (CO2), dry extinguishing powder, Water spray to extinguish. P403+P233 - Store in a well-ventilated place. Keep container tightly closed. 03/23/2018 EN (English US) Page 1 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations P403+P235 - Store in a well-ventilated place. Keep cool. P405 - Store locked up. P501 - Dispose of contents/container to hazardous or special waste collection point, in accordance with local, regional, national and/or international regulation 2.3. Other hazards which do not result in classification No additional information available 2.4. Unknown acute toxicity (GHS US) Not applicable SECTION 3: Composition/Information on ingredients 3.1. Substances Name Product identifier % Diacetone alcohol (Main constituent) (CAS-No.) 123-42-2 >= 99 Full text of hazard classes and H-statements : see section 16 3.2. Mixtures Not applicable SECTION 4: First-aid measures 4.1. Description of first aid measures First-aid measures general First-aid measures after inhalation First-aid measures after skin contact First-aid measures after eye contact First-aid measures after ingestion : Call a poison center/doctor/physician if you feel unwell. : Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor/physician if you feel unwell. : Wash skin with plenty of water. : Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. : Call a poison center/doctor/physician if you feel unwell. 4.2. Most important symptoms and effects (acute and delayed) Symptoms/effects after inhalation Symptoms/effects after eye contact : May cause respiratory irritation. : Eye irritation. 4.3. Immediate medical attention and special treatment, if necessary Treat symptomatically. SECTION 5: Fire-fighting measures 5.1. Suitable (and unsuitable) extinguishing media Suitable extinguishing media : Water spray. Dry powder. Foam. Carbon dioxide. 5.2. Specific hazards arising from the chemical Fire hazard : Combustible liquid. Reactivity : The product is non-reactive under normal conditions of use, storage and transport. 5.3. Special protective equipment and precautions for fire-fighters Protection during firefighting : Do not attempt to take action without suitable protective equipment. Self-contained breathing apparatus. Complete protective clothing. SECTION 6: Accidental release measures 6.1. Personal precautions, protective equipment and emergency procedures 6.1.1. For non-emergency personnel Emergency procedures : Ventilate spillage area. No open flames, no sparks, and no smoking. Avoid breathing dust/fume/gas/mist/vapors/spray. Avoid contact with skin and eyes. 6.1.2. For emergency responders Protective equipment : Do not attempt to take action without suitable protective equipment. For further information refer to section 8: "Exposure controls/personal protection". 6.2. Environmental precautions Avoid release to the environment. 03/23/2018 EN (English US) 2/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations 6.3. Methods and material for containment and cleaning up Methods for cleaning up Other information : Take up liquid spill into absorbent material. Notify authorities if product enters sewers or public waters. : Dispose of materials or solid residues at an authorized site. 6.4. Reference to other sections For further information refer to section 13. SECTION 7: Handling and storage 7.1. Precautions for safe handling Precautions for safe handling Hygiene measures : Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Wear personal protective equipment. Use only outdoors or in a well-ventilated area. Avoid breathing dust/fume/gas/mist/vapors/spray. Avoid contact with skin and eyes. : Do not eat, drink or smoke when using this product. Always wash hands after handling the product. 7.2. Conditions for safe storage, including any incompatibilities Storage conditions : Store in a well-ventilated place. Keep cool. Store locked up. Keep container tightly closed. SECTION 8: Exposure controls/personal protection 8.1. Control parameters Diacetone alcohol (123-42-2) ACGIH Local name Diacetone alcohol ACGIH ACGIH TWA (ppm) 50 ppm ACGIH Remark (ACGIH) URT & eye irr OSHA OSHA PEL (TWA) (mg/m³) 240 mg/m³ OSHA OSHA PEL (TWA) (ppm) 50 ppm IDLH US IDLH (ppm) 1800 ppm (10% LEL) NIOSH NIOSH REL (TWA) (mg/m³) 240 mg/m³ NIOSH NIOSH REL (TWA) (ppm) 50 ppm 8.2. Appropriate engineering controls Appropriate engineering controls Environmental exposure controls : Ensure good ventilation of the work station. : Avoid release to the environment. 8.3. Individual protection measures/Personal protective equipment Hand protection: Protective gloves Eye protection: Safety glasses Skin and body protection: Wear suitable protective clothing Respiratory protection: In case of insufficient ventilation, wear suitable respiratory equipment SECTION 9: Physical and chemical properties 9.1. Information on basic physical and chemical properties Physical state : Liquid Appearance : Colorless liquid. Turns yellow on aging. Color : Colorless, Yellow Odor : pleasant, Sweet Odor threshold : 0.3 ppm 03/23/2018 EN (English US) 3/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations pH : No data available Melting point : Not applicable Freezing point : -47 °C ; -52.6 °F Boiling point : 168 °C ; 334.4 °F Flash point : 61 - 65.6 °C ; 142 - 150°F closed cup Relative evaporation rate (butyl acetate=1) : No data available Flammability (solid, gas) : Not applicable. Vapor pressure : 0.97 mm Hg @20C Relative vapor density at 20 °C : 4 Relative density : 0.93 (at 25 °C) Specific gravity / density : 0.94 g/cm³ (at 20 °C) Molecular mass : 116.2 g/mol Solubility : Soluble in water. Log Pow : 1.03 Auto-ignition temperature : 640 °C ; 1184 °F Decomposition temperature : No data available Viscosity, kinematic : No data available Viscosity, dynamic : No data available Explosion limits : 1.8 - 6.9 vol % Explosive properties : No data available Oxidizing properties : No data available 9.2. Other information No additional information available SECTION 10: Stability and reactivity 10.1. Reactivity The product is non-reactive under normal conditions of use, storage and transport. 10.2. Chemical stability Stable under normal conditions. 10.3. Possibility of hazardous reactions No dangerous reactions known under normal conditions of use. 10.4. Conditions to avoid Avoid contact with hot surfaces. Heat. No flames, no sparks. Eliminate all sources of ignition. 10.5. Incompatible materials No additional information available 10.6. Hazardous decomposition products Under normal conditions of storage and use, hazardous decomposition products should not be produced. SECTION 11: Toxicological information 11.1. Information on toxicological effects Acute toxicity : Not classified Diacetone alcohol (123-42-2) LD50 oral rat > 4 g/kg LD50 dermal rat > 1875 mg/kg body weight (Equivalent or similar to OECD 402, 24 h, Rat, Male/female, Experimental value) Skin corrosion/irritation : Not classified Serious eye damage/irritation : Causes serious eye irritation. Respiratory or skin sensitization : Not classified Germ cell mutagenicity : Not classified Carcinogenicity : Not classified Reproductive toxicity : Not classified 03/23/2018 EN (English US) 4/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Specific target organ toxicity – single exposure : May cause respiratory irritation. Specific target organ toxicity – repeated exposure : Not classified Aspiration hazard : Not classified Symptoms/effects after inhalation Symptoms/effects after eye contact : May cause respiratory irritation. : Eye irritation. SECTION 12: Ecological information 12.1. Toxicity Ecology - general : The product is not considered harmful to aquatic organisms or to cause long-term adverse effects in the environment. Diacetone alcohol (123-42-2) LC50 fish 1 420 mg/l (Exposure time: 96 h - Species: Lepomis macrochirus [static]) LC50 fish 2 420 mg/l (Exposure time: 96 h - Species: Lepomis macrochirus) 12.2. Persistence and degradability No additional information available 12.3. Bioaccumulative potential Diacetone alcohol (123-42-2) Log Pow 1.03 12.4. Mobility in soil No additional information available 12.5. Other adverse effects No additional information available SECTION 13: Disposal considerations 13.1. Disposal methods Waste treatment methods : Dispose of contents/container in accordance with licensed collector’s sorting instructions. SECTION 14: Transport information Department of Transportation (DOT) In accordance with DOT Transport document description UN-No.(DOT) : NA1993 Proper Shipping Name (DOT) : NA1993 Combustible liquid, n.o.s. (Diacetone Alcohol), 3, III Class (DOT) Packing group (DOT) DOT Packaging Non Bulk (49 CFR 173.xxx) : 203 DOT Packaging Bulk (49 CFR 173.xxx) DOT Symbols DOT Special Provisions (49 CFR 172.102) : Combustible liquid, n.o.s. Diacetone Alcohol : 3 - Class 3 - Flammable and combustible liquid 49 CFR 173.120 : III - Minor Danger : 241 : D - Proper shipping name for domestic use only, or to and from Canada,G - Identifies PSN requiring a technical name : IB3 - Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 C (1.1 bar at 122 F), or 130 kPa at 55 C (1.3 bar at 131 F) are authorized, except for UN2672 (also see Special Provision IP8 in Table 2 for UN2672). T1 - 1.5 178.274(d)(2) Normal............. 178.275(d)(2) T4 - 2.65 178.274(d)(2) Normal............. 178.275(d)(3) TP1 - The maximum degree of filling must not exceed the degree of filling determined by the following: Degree of filling = 97 / 1 + a (tr - tf) Where: tr is the maximum mean bulk temperature during transport, and tf is the temperature in degrees celsius of the liquid during filling. DOT Packaging Exceptions (49 CFR 173.xxx) : 150 03/23/2018 EN (English US) 5/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations DOT Quantity Limitations Passenger aircraft/rail (49 CFR 173.27) DOT Quantity Limitations Cargo aircraft only (49 CFR 175.75) DOT Vessel Stowage Location : 60 L : 220 L Emergency Response Guide (ERG) Number : 128 Other information Transport by sea Not regulated Air transport Not regulated : A - The material may be stowed ‘‘on deck’’ or ‘‘under deck’’ on a cargo vessel and on a passenger vessel. : No supplementary information available. SECTION 15: Regulatory information 15.1. US Federal regulations Diacetone alcohol (123-42-2) Listed on the United States TSCA (Toxic Substances Control Act) inventory This product or mixture is not known to contain a toxic chemical or chemicals in excess of the applicable de minimis concentration as specified in 40 CFR §372.38(a) subject to the reporting requirements of section 313 of Title III of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR Part 372. 15.2. International regulations CANADA Diacetone alcohol (123-42-2) Listed on the Canadian DSL (Domestic Substances List) EU-Regulations Diacetone alcohol (123-42-2) Listed on the EEC inventory EINECS (European Inventory of Existing Commercial Chemical Substances) National regulations Diacetone alcohol (123-42-2) Listed on the AICS (Australian Inventory of Chemical Substances) Listed on IECSC (Inventory of Existing Chemical Substances Produced or Imported in China) Listed on the Japanese ENCS (Existing & New Chemical Substances) inventory Listed on the Japanese ISHL (Industrial Safety and Health Law) Listed on the Korean ECL (Existing Chemicals List) Listed on NZIoC (New Zealand Inventory of Chemicals) Listed on PICCS (Philippines Inventory of Chemicals and Chemical Substances) Listed on INSQ (Mexican National Inventory of Chemical Substances) Listed on CICR (Turkish Inventory and Control of Chemicals) Listed on the TCSI (Taiwan Chemical Substance Inventory) 15.3. US State regulations Diacetone alcohol (123-42-2) State or local regulations U.S. - Massachusetts - Right To Know List U.S. - New Jersey - Right to Know Hazardous Substance List U.S. - Pennsylvania - RTK (Right to Know) List SECTION 16: Other information Revision date : 03/23/2018 03/23/2018 EN (English US) 6/7 <<>> Diacetone Alcohol Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Full text of H-phrases: H227 Combustible liquid H319 Causes serious eye irritation H335 May cause respiratory irritation SDS US (GHS HazCom 2012) DISCLAIMER: Monument Chemical believes that the information expressly set forth in this Safety Data Sheet (SDS) is accurate as of the date of publication. MONUMENT CHEMICAL EXPRESSLY DISCLAIMS ALL WARRANTIES OF EVERY KIND AND NATURE, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Unless indicated otherwise word for word on the safety data sheet, the information does not apply to substances/preparations/mixtures in purer form, mixed with other substances or in processes. The safety data sheet offers no quality specification for the substances/preparations/mixtures in question. Monument Chemical assumes no responsibility for any use of or reliance upon the data provided in this SDS. Given the variety of factors that can affect the use of the material, some of which are uniquely within the user’s knowledge and control, the user should independently evaluate (i) the completeness and accuracy of the information provided herein and (ii) the material to determine whether it is suitable and safe for the user’s intended use. Monument Chemical provides information in electronic form as a service to its customers. Due to the remote possibility that electronic transfer may have resulted in errors, omissions or alterations in this information, Monument Chemical makes no representations as to its completeness or accuracy. In addition, information obtained from a database may not be as current as the information in the SDS available directly from Monument Chemical. 03/23/2018 EN (English US) 7/7 ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `59276d5a78f1f5b1315784b52beb8912c511a66d0a030f71cff6a198225fd3cb` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T10:35:52.784Z - Document slug: `phmsa-interpretation-21-0115` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Intermodal Tank Transport" ], "individuals": [ "Jasmine Builes" ], "refIds": [ "21-0115" ], "catalogDates": [ "2022-03-09" ], "catalogParts": [ 171, 172, 173 ], "catalogRowCount": 3, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/73126" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "171.23", "172.101", "173.120", "172.102", "178.274(d)(2)", "178.275(d)(2)", "173.27", "175.75" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/17123", "https://www.phmsa.dot.gov/regulations/title49/section/172101", "https://www.phmsa.dot.gov/regulations/title49/section/173120" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/76386/210115.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/76386/210115.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/76386/210115.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/21-0115-b980c6ccd9.pdf", "pdfArtifactSha256": "8c1728b6434cf3648e7e181a3294580f6bc7972f7698a1d4adcaa59b67989894", "extractedTextPath": "data/sources/phmsa-interpretations/21-0115-b980c6ccd9.v2.txt", "extractedTextSha256": "f3069e81c9ec9b9dd1e30a9e05ddef02fb4231bd851f2b2f7ead2ce62a79016f", "pageCount": 18, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```