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A United States placard showing the UN number 1814, indicating potassium hydroxide solution, on a railroad tank car.. A UN number (United Nations number) is a four-digit number that identifies hazardous materials, and articles (such as explosives, flammable liquids, oxidizers, toxic liquids, etc.) in the framework of international trade and transport.
n.o.s. = not otherwise specified meaning a collective entry to which substances, mixtures, solutions or articles may be assigned if a) they are not mentioned by name in 3.2 Dangerous Goods List AND b) they exhibit chemical, physical and/or dangerous properties corresponding to the Class, classification code, packing group and the name and description of the n.o.s. entry [4]
Photograph of a placard with NA number 3082. The NA numbers (North American Numbers are assigned by the United States Department of Transportation, supplementing the larger set of UN numbers, for identifying hazardous materials. NA numbers largely duplicate UN numbers, however a selection of additional numbers are provided for materials that ...
More than 90% of these shipments are transported by truck, and anywhere from 5–15% of those trucks are carrying hazardous materials regulated under the HMTA. Approximately 50% of those materials are corrosive or flammable petroleum products, while the remaining shipments represent any of the 2,700 other chemicals considered hazardous in ...
The Emergency Response Guidebook: A Guidebook for First Responders During the Initial Phase of a Dangerous Goods/Hazardous Materials Transportation Incident (ERG) is used by emergency response personnel (such as firefighters, paramedics and police officers) in Canada, Mexico, and the United States when responding to a transportation emergency involving hazardous materials.
Poison: 454 kg (1001 lb) or more gross weight of poisonous materials that are not in Hazard Zone A or B (see Assignment of packing groups and hazard zones below). For U.S. Domestic Use only.
UN Number Class Proper Shipping Name UN 3401: 4.3: Alkali metal amalgam, solid UN 3402: 4.3: Alkaline earth metal amalgam, solid UN 3403: 4.3: Potassium metal alloys, solid UN 3404: 4.3: Potassium sodium alloys, solid UN 3405: 5.1: Barium chlorate solution UN 3406: 5.1: Barium perchlorate solution UN 3407: 5.1: Chlorate and magnesium chloride ...
The most common dangerous goods are assigned a UN number, a four digit code which identifies it internationally. Less common substances are transported under generic codes such as "UN1993: flammable liquid, not otherwise specified". The UN Recommendations do not cover the manufacturing, use or disposal of dangerous goods.