{"operation":"document","citation":"04-0161","title":"URS Corporation — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2004-02-11","effective_on":null,"summary":"04-0161 response to URS Corporation concerning 172.101.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0161.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0161.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-04-0161","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040161.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\nFEB 1 1 2004\n400 Seventh St., S.W.\nWashington, D.C. 20590\nSpecial Programs\nResearch and\nAdministration\nMr. Andrew N. Romach\nRef. No. 04-0161\nCorporate Regulatory Manager\nURS Corporation\n1600 Perimeter Park Drive\nMorrisville, NC 27560\nDear Mr. Romach:\nThis responds to your letter requesting our assistance in\ndetermining the correct shipping description for a metal powder,\nin a flammable liquid under the Hazardous Materials Regulations\nwhich meets the definition of a flammable solid, when suspended\n(HMR; 49 CFR Parts. 171-180).\nYou posed a scenario of a\nmaterial, Aluminum powder coated, 4.1, UN1309, PG II, suspended\nin a flammable liquid (solvent) mixture that has a flash point\nof about 63°F (Class 3, PG II). It is your understanding that\n10853, Be Than 15C\nthere are no proper shipping names listed in the S 172.101\nHazardous Materials Table (HMT) for these mixtures except for\nZirconium suspended in a liquid, UN1308. I apologize for the\ndelay\nin responding\nand any inconvenience it may have caused.\nYou are correct that no specific or generic description for your\nmaterial currently exists in the HMT. In your scenario,\nprovided the aluminum powder is compatible with the flammable\nliquid in your mixture and the overall mixture does not meet the\nshould be described as. \"Flammable liquids, n.o.s. (1-methoxy-2-\ndefinition of another hazard class, it is our opinion that it\npropyl acetate, Xylene), 3, UN1993, PG II. \" We anticipate\nproposing generic descriptions in the HMT for scenarios such as\nyours in a future rulemaking.\nI trust this satisfies your inquiry.\nPlease contact us if we\ncan be of further assistance.\nHate z nicho\nHattie I. Mitchell\nChief, Regulatory Review and Reinvention\nOffice of Hazardous Materials Standards\n172.101\n040161\n\n<<<PAGE 2>>>\n\nURS Corporation\nURS\nMorrisville, NC 27560\n1600 Perimeter Park Drive\nFax: 919.461.1371\nTel: 919.461.1220\nJuly 6, 2004\nandy_romach@urscorp.com\nStevens\nMr. Ed Mazzullo, Director\nOffice of Hazardous Material Standards\nResearch and Special Programs Administration\n5172.101.\nU.S. Department of Transportation\n400 7th Street, SW (DHM-10)\nProper Shipping Name\nFAX: (202) 366-3012\nWashington, DC 20590-0001\n04-8161\nDear Mr. Mazzullo:\nI am writing to you to request a written regulatory interpretation clarifying what would be the most\nappropriate proper shipping name to use when transporting a metal powder that meets the definition of a\nflammable solid, when it is suspended in a flammable liquid. In the Hazardous Material Table (49 CFR\nsuspended in a liquid.'\n173.101), I found a proper shipping name that addressed a specific metal powder, zirconium: Zirconium\nroper shipping name lists a primary hazard class of Class 3 but lists no subsidiary hazards. Three\nDry zirconium is classified as a 4.2; wetted zirconium is classified as a 4.1.) Thi:\naccount, it would appear that the flammable liquid would become the primary and only conveyed hazard\npacking groups are listed, dictated by the flashpoint of the flammable liquid. Taking this precedence into\nfor a flammable solid suspended in a flammable liquid.\nCoated, 4.1, UN1309, PGII) suspended in a solvent mixture of xylene and 1-methoxy-2-propyl acetate,\nA specific scenario that I recently encountered is an aluminum flake (classified as Aluminum Powder\nwith overall solution flashpoint of about 63°F (Class 3, PGII):\nChemical Name\nCAS No.\nWeight%\n1-Methoxy-2-propyl acetate\n108-65-6\n40-50%\nAluminum Powder\n7429-90-5\n50-60%\nXylene\n1330-20-7\n5-10%\nsuspended in a flammable liquid, n.o.s.; or Metal powder, flammable, suspended in a flammable liquid,\nI was unable to find a generic proper shipping name to describe this scenario, such as: Flammable solid,\nn.o.s.\nWhat would be the appropriate proper shipping name for the above-described solution? If a generic\nproper shipping name is selected, what would be the appropriate technical names to list and in what\norder?\nThank you for your consideration of this request.\nSincerely,\nAlike\nAndrew N. Romach\nCorporate Regulatory Manager\nURS Corporation\n' In the International Civil Aviation Organization's (ICAO) Technical Instructions for the Safe Transport of\nthe ongoing move toward harmonization, it would seem the DOT should align its proper shipping name with ICAO.\nDangerous Goods by Air, the comparable proper shipping name is: Zirconium suspended in a flammable liquid. In","truncated":false,"body_characters":4393}