United Nations/North American Identification Number

United Nations/North American Identification Number(s) UN/NA identification numbers are four-digit numbers assigned to identify and cross-reference a hazardous materials (i.e., nitric acid, fuming = 2032 butane = 1011 white phosphorus, dry = 1381). 

DOT Identification Numbers Four-digit numbers proceeded by UN (United Nations) or NA (North American) that are used to identify the particular hazardous materials for regulation of transportation (e.g., the UN code number for chlorine trifluoride is UN1749). Haz Mat Response Teams (HMRTs) often refer to such numbers to identify specific chemicals listed in the Department of Transportation s Emergency Response Guidebook Double Gloving An additional set of gloves worn in addition to the already in-place protection. 

The UN Number element of each chapter includes the 4-digit serial numbers assigned under the United Nations scheme that represent the entries covered in the chapter. Also included are the supplementary North American numbers (NA numbers, including those in the 9000 series) used by the DOT and the identification numbers (ID numbers in the 8000 series) used by lATA. UN Numbers form an index at the rear of the Glossary. The following methodology was used to prepare the UN Numbers ... 

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