What is the hazmat id number for hazard class 3?

Answer 1

There is no class 3.1 in the system for classifying the hazards of materials in transportation. Class 3 is for flammable liquids and has no further divisions.

Until about the year 2000, the classification system issued by the International Maritime Organization for hazardous materials transported by ocean vessel did have divisions in the Class 3 flammable liquid category. Those have been invalid for many years and any document listing a material as Division 3.1 instead of Class 3 would be unacceptable, even in marine transportation.

Answer 2

Flammable Liquids, not otherwise classified have UN ID number 1993. However, many specific flammable liquids and categories of flammable liquids have other UN ID numbers. Always consult a trained qualified person when determining how to prepare and document a hazardous materials shipment.