{"operation":"document","citation":"05-0032","title":"Seacon Corporation — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2005-03-10","effective_on":null,"summary":"05-0032 response to Seacon Corporation concerning 172.101.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-05-0032.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-05-0032.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-05-0032","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050032.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\n400 Seventh Street, S.W.\nWashington, D.C. 20590\nPipeline and\nAdministration\nHazardous Materials Safety\nMAR 10 2005\nMr. Sean E. Condren\nPresident\nRef. No. 05-0032\nSeacon Corporation\n525 N. Tryon St., Suite 1600\nCharlotte, NC 28202\nDear Mr. Condren:\nThis is in response to your request for clarification concerning the applicability of the\nHazardous Materials Regulations (HMR; 49 CFR Parts 171-180) to the domestic\ntransportation of \"Azodicarbonamide,\" UN3242. Specifically, you ask whether your\nmaterial is regulated under the HMR. You state that the material has a self-accelerated\ndecomposition temperature (SADT) above 75 °C and does not meet the definition of\nDivision 4.1 or any other hazard class under the HMR.\nIn the § 172.101 Hazardous Materials Table, \"Azodicarbonamide,\" UN3242 is assigned\nSpecial Provision 38, which states that when the SADT of the technically pure substance\nis higher than 75°C, the substance and formulations derived from it are not self-reactive,\nand provided the material does not meet any other hazard class, it is not regulated under\nthe HMR. If these conditions are met, you are correct that your azodicarbonamide is not\nregulated under the H.MR and, therefore, is not regulated for domestic transportation.\nHowever, as also contained in Special Provision 38, if the azodicarbonamide shows a\nviolent effect during testing involving heating under confinement, the material is\nregulated for domestic transportation and must be packaged in accordance with Packing\nMethod OP6 in § 173.225 and meet the labeling requirements in Special Provision 53.\nI hope this information is helpful. Please contact this office if we can be of further\nassistance.\nSincerely,\nHitle 7. Mithill\nHattie L. Mitchell\nChief, Regulatory Review and Reinvention\nOffice of Hazardous Materials Safety\n172.101\n050032\n\n<<<PAGE 2>>>\n\nFEB 09 2005 11:47AM\nSEACON CORP\n704-331-3921\np.2\nSEACON\nMInture\n525 N. Tryon St.\nSeacon Corporation\nSuite 1600\nCORPORATION\n$172.101\n(704) 331-3920\nCharlotte, NC 28202\n(704) 331-3921 fax\nscan@scaconcorp.com\nApplicability\nAkron, OH 44301\n1145 Highbrook Sc.\nFebruary 9, 2005\n(330) 376-505:\n05-0032\n(330) 376-2888 fe\nDirector, Office of Hazardous Material Standards\nMr. Edward Mazzullo •\n400 7* Street S.W.\nU.S. D.O.T. / RSPA (DHM-10)\nWashington, DC 20590-0001\nRe:\nAzodicarbonamide / UN3242\nDear Director Mazullo:\nSeacon Corporation imports Azodicarbonamide and ships this material to customers throughout\nthe U.S. This chemical is regulated as a 4.1 flammable solid by the IMDGC, and is also listed in\nthe 49 CFR 172.101 Hazardous Materials Table as a 4.1 flammable solid. Special Provision 38,\nand formulations derived from it are not self-reactive materials.\"\nassigned to this entry, states that \"if the SADT is higher than 75°C, the technically pure substance\nthese grades do not meet the definition of \"Readily Combustible Solid,\" are not forbidden\nAll grades of azodicarbonamide Seacon ships in the U.S. have SADT above 75°C. Furthermore,\nmaterials, and do not meet the definition of any other hazard class as prescribed in\n§172.101(a)(12)(iv).\nchemical name is listed in the HMR table and each carton we ship has a 4.1 label because of\nThough we do not describe azodicarbonamide as a hazardous material on our shipping papers, the\nIMDGC regulations. As you can imaginc, this contradiction creates confusion with our\ncustomers, trucking companies, and warehouses.\nazodicarbonamide with SADT above 75°C are non-hazardous? We would then use this letter to\nWould your office please send Seacon a brief letter of clarification stating that shipments of\nresolve any disputes that might arise.\nPlease feel free to contact our office if you have any questions or require additional information.\nThank you for your consideration.\nSincerely,\nCubanke\nPresident\nSean E. Condren","truncated":false,"body_characters":3852}