{"operation":"document","citation":"01-0095","title":"Atlantic Research Corporation — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2001-05-22","effective_on":null,"summary":"01-0095 response to Atlantic Research Corporation concerning 172.101.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-01-0095.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-01-0095.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-01-0095","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2001/010095.pdf","body":"<<<PAGE 1>>>\n\nof Transportation\nU.S. Department\n400 Seventh Street. S.W.\nWashington, D.C.\n20590\nResearch and\nSpecial Programs\nAdministration\nMAY 2 2 2001\nMr. Aaron Greso\nRef. No. 01-0095\nAtlantic Research Corporation\n5945 Wellington Road\nGainesville, Virginia 20166-1699\nDear Mr. Greso:\nThis responds to your April 17, 2001 letter requesting clarification on the correct classification of your\nmixture under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you\nask for the correct classification of a mixture of silver nitrate and potassium nitrate, each of which is\nclassed as a Division 5.1 material.\nYour understanding that a \"new\" material must be tested as a Class 1 explosive using the \"Card Gap\"\ntest under the UN Manual of Tests and Criteria is incorrect. Such a test is required only where other\ninformation indicates the material could have explosive properties. Under the HMR, it is the shipper's\nresponsibility to determine the hazard class of the material to be transported. This Office does not\nperform that function. In making this determination, you must consider the characteristics of the entire\nmixture rather than its individual components. Based on the test results and information provided in\nyour letter, it is the opinion of this Office that the mixture of silver nitrate and potassium nitrate should be\nclassed according to the Division 5.1 packing group criteria in § 173.127 of the HMR.\nI hope this answers your inquiry.\nSincerely,\nTransportation Regulations Specialist\nOffice of Hazardous Materials Standards\n010095\n17210)\n\n<<<PAGE 2>>>\n\na unil of Sequa Corporation\nAtlantle Rosearch Carparution\n172:16.1\nGainesville, Virginia 20166-1689\n6946 Wellington Road\n703 754-5000\nApril 17, 2001\nCIA SEQUA\nfication\n01-0095\nDirector for the Office of Hazardous Material Standards\nU.S. Department of Transportation RSPA (DHM10)\nWashington DC 20590-0001\nFX 202 366-3012\nDear Mr. Mazzullo,\nI am writing to you to request an interpretation of the standards as applied to a mixture of already classified\nmaterials.\nWe are planning to make a mixture of silver nitrate (AgN) and potassium nitrate (KN). Each is already\nHowever, according to the UN \"Orange book\", Transport of Dangerous Goods, Manual of Tests and Criteria,\nall \"new\" materials should be tested as a Class 1 explosive in a \"Card Gap\" test.\nThis requirement, for this material, is somewhat puzzling. When this material is placed upon a hot plate,\nusing a DSC (differential scanning calorimeter), the material shows no exotherm until exceeding 400 °C-after\noperating in the area of 400 °C, the material bubbles and boils away—without a flame. When investigated\nwhich temperature, the exother could represent the decomposition of silver nitrate. (Decomposition\ntemperature of AgN is 444 C; KN melts at 334 °C, AgN melts at 212 °C.)\n>8 Kg @ 50 cm; 2) \"Friction\" >1800 psi @ 90°, and 3) \"ESD\" >6 Joules. [All three tests showing 10\nIn addition, the material passes all of the following material hazards at the highest settings: 1) \"Drop weight'\nsubsequent negative results for each test].\npossible to interpret this material as not being a Class 1 material?\nSince the material will not bum by itself, nor will it ignite when physically manipulated in a rigorous manner, is it\nI would like to classify this material as a 5.1 Class Il, simply because silver nitrate, the most hazardous\nmaterial in the mixture, is classified as 5.1 Class II.\nCan the test results, listed above, be interpreted as indicating that the material is not a Class 1.x material?\nI would prefer not to have to ship off site, an expensive, used, unburned material, recovered from a card-gap\nrest, for recycling.\nThank you for any help you can give.\nFX 703 754 5346\n[1] K. Meszaros Szocsenyi, K. Tomor, and G. Pokol; J. Thermal Analysis, 11 (1884) 125-134\nHigh techrukuzy lendorghip since 1948\nARC\nTOTAL P. 01","truncated":false,"body_characters":3880}