A UN (United Nations) number is used by the Department of Transportation (DOT) as a method of identification and classification of products for shipping purposes.
UN numbers are different from the hazard class or division designations used by DOT (for example, 1.1, 1.2, 1.3, 1.4, and 1.5). bet365 出金 regulations in also use UN numbers to help identify certain explosives.
[27 CFR 555.11]