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Identification numbers (Hazmat)
['Hazardous Materials Table']
- HMT Column 4 provides identification numbers that pertain to domestic and international transportation.
Column 4 of the Hazardous Materials Table (HMT) provides the material’s UN, NA, or ID identification number. Numbers preceded by the letters “UN” are appropriate for both international and domestic transportation. Those preceded by “NA” are for domestic transportation and not for international transportation. Those preceded by “ID” are for use with the International Civil Aviation Organization (ICAO) Technical Instructions for air transport.
The NA9000 series of identification numbers are used with proper shipping names that are not appropriately covered by the international regulations, or not appropriately addressed by the international standards for emergency response information purposes.