# Patterson Companies, Inc. — Hazardous Materials Safety Interpretation **Citation:** 13-0076 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2013-07-15 13-0076 response to Patterson Companies, Inc. concerning 172.405, 173.132, 173.22. ## Document text <<>> U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Avenue, SE Washington, D.C. 20590 JUL 1 5 2013 Mr. Robb Boros Patterson Companies, Inc. 1905 Lakewood Drive Boone, Iowa 50036 Reference No. 13-0076 Dear Mr. Boros: This is in response to your April 11, 2013 letter requesting clarification on the classification of a material under the Hazardous Materials Regulations (I-IMR; 49 CFR Parts 171-180). The material you describe in your letter is a 47.6% solution of gluteraldehyde using a shipping name of "Corrosive liquid, organic, n.o.s." You state that according to the National Institute of Health, glutaraldehyde has an LD50 value of 134 mg/kg. Further, in your letter you state that using the equation provided in§ 173.132(c)(3) resulted in a calculated LD50 value of 280.69 mg/kg oral rat. You ask if the results of the calculation are correct, would the glutaraldehyde solution meet the definition of a toxic liquid? In addition, you ask whether it is permitted to apply the Packing Group (PG) III toxic label authorized in§ 172.405(c) as the subsidiary hazard label in addition to the corrosive diamond label? In accordance with § 173.22, it is the shipper's responsibility to properly classify a hazardous material. This Office does not generally perform that function. However, based on the test results you provided, the material does meet the LD50 criteria for acute oral toxicity. Also, based on this information, we agree that the material does meet the definition in § 173.132(a)(l)(i) for a Division 6.1 material. Therefore, if the material has a subsidiary hazard which is classed as Division 6.1, Packing Group III, the subsidiary "POISON" label may be modified to display the text "PG III" instead of"POISON" or "TOXIC" below the mid line of the label as specified in § 172.405( c). I hope this satisfies your request. Sincerely, c--Y#~~~· T. Glenn Foster Chief, Regulatory Review and Reinvention Branch Standards and Rulemaking Division <<>> Andrews . ~113 ·13cfl(t)(3) ~ 11~, !4f~6 {e) Drakeford, Carolyn (PHMSA) From: Sent: To: Subject: Importance: INFOCNTR (PHMSA) Thursday, April 11, 2013 3:57 PM Drakeford, Carolyn (PHMSA) FW: Glutaraldehyde solution 47.6% High Hi Carolyn, This caller requested we submit his e-mail as a formal letter of interpretation. Thanks, Victoria From: robb.boros@pattersoncompanies.com [mailto:robb.boros@pattersoncompanies.com] Sent: Wednesday, April 10, 2013 6:30 PM To: INFOCNTR (PHMSA) Subject: Glutaraldehyde solution 47.6% Importance: High A company classifies a 47.6% solution of glutaraldehyde as Corrosive liquid, acidic, organic, n.o.s .. However, several sources, including the NIH, has identified Glutaraldehyde as having an LD50 value of 134mg/kg oral rat. Upon calculating the toxicity using the equation in 173.132(c)(3) resulted in a calculated LD50 value of 280.69 mg/kg oral rat. Question 1: Based on the calculation above, am I correct that the glutaraldehyde solution would meet the definition of a toxic liquid since the calculated value is less than 300mg/kg oral rat? Question 2: If my understanding above is correct, the full shipping description would be UN2922, Corrosive liquid, toxic, n.o.s. (Glutaraldehyde), 8(6.1 ), PGII. But since the toxicity is PG Ill would I be able to apply the packing group Ill toxic label authorized in 172.405(c) as the subsidiary hazard label in addition to the corrosive diamond label? Thanks Robb Boros Regulatory Compliance Specialist Patterson Companies, Inc. 515.433.1700 (Fax 1701) NOTICE: This email transmission and any attachments that accompany it may contain information that is confidential or otherwise exempt from disclosure under applicable law and is intended solely for the use of the individual(s) to whom it was intended to be addressed. If you have received this email by mistake, or you are not the intended recipient, any disclosure, dissemination, distribution, copying or other use or retention of this communication or its substance is prohibited. If you have received this communication in error, please immediately report to the author via email that you received this message by mistake and also permanently destroy printed copies and delete the original and all copies of this email and any attachments from your computer. 1 ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `3a58dbd1b8db74250987ec4fdc34149d8d32d346ab839b2613b4c7707b8f5d7c` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-25T07:06:19.366Z - Document slug: `phmsa-interpretation-13-0076` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Patterson Companies, Inc." ], "individuals": [ "Mr. Robb Boros" ], "refIds": [ "13-0076" ], "catalogDates": [ "2013-07-15" ], "catalogParts": [ 172, 173 ], "catalogRowCount": 3, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/48166" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "172.405", "172.405(c)", "173.132", "173.132(c)(3)", "173.22" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/172405", "https://www.phmsa.dot.gov/regulations/title49/section/173132", "https://www.phmsa.dot.gov/regulations/title49/section/17322" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2013/130076.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2013/130076.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2013/130076.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/13-0076-36138e41f0.pdf", "pdfArtifactSha256": "7515a674b1b23c267aadd269ad1603a4c1fbc551611689361e0f4701e06cd1a3", "extractedTextPath": "data/sources/phmsa-interpretations/13-0076-36138e41f0.v2.txt", "extractedTextSha256": "50c4e2fb0a02102a7a7d6074ce64578bd8b51b2f8fd18d57196cfe0d5694c7b3", "pageCount": 2, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```