• HMT Column 3 lists the hazard class or division corresponding to the proper shipping name, which can become tricky when more than one hazard class or division applies.

Column 3 of the Hazardous Materials Table (HMT) lists the hazard class or division that corresponds to the proper shipping name. When the material is too hazardous to be transported, the word “Forbidden” will be shown.

This prohibition does not apply if the material is diluted, stabilized, or incorporated in a device and is classified according to the hazard class definitions.

Since the hazard class or division affects how a material is packaged and labeled, it is important that the one listed for the selected proper shipping name matches the material being transported. This becomes an issue when more than one hazard class or division is listed for a given proper shipping name.

Example: Paint-related material is listed as both a Class 8 (corrosive) material and a Class 3 (flammable liquid) material. In the table, the labels, special provisions, authorized packagings, and quantity limitations differ between the two entries.

If the proper shipping name is preceded by a plus (+) in Column 1, the proper shipping name, hazard class, and packing group are fixed even if the material does not meet the definition of the class, packing group, or any other hazard class.