UN number
UNITED NATIONS CODE FOR DANGEROUS SUBSTANCES
NA number; Hazard identifier; UN/NA Number; DOT UN/NA Number; UN numbers; UN Number; NA numbers; UN/NA number
UN number (United Nations number) is 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.