DOT HM-232 Applicability

Each facility that offers for transportation in commerce a threshold quantity of one or more of the hazardous materials delineated in the chart below must develop and adhere to a hazardous materials transportation security plan.

Hazard Class/Division


Threshold Quantity

Division 1.1, 1.2, and 1.3 Explosives Any Quantity
Division 1.4, 1.5, and 1.6 Explosives Any Quantity Requiring Placarding
Division 2.1 Flammable Gases Large Bulk Quantity
Division 2.2 Nonflammable Gases Large Bulk Quantity with Subsidiary Hazard of Division 5.1 Oxidizer
Division 2.3 Poisonous Inhalation Hazard (PIH) Any Quantity
Class 3 and Division 4.1 Desensitized Explosives 454 kg (1,001 pounds) or Greater in a Single Transport Vehicle or Freight Container
Class 3 Flammable Liquids Large Bulk Quantity in Packing Group I or II
Division 4.2 Spontaneously Combustible Large Bulk Quantity in Packing Group I or II
Division 4.3 Dangerous When Wet Any Quantity
Division 5.1 Oxidizers Large Bulk Quantity in Packing Groups I and II
Division 5.2 Organic Peroxides Any Quantity of Organic Peroxide, Type B, Liquid or Solid, Temperature Controlled
Division 6.1 Poisonous Materials Other than PIH Large Bulk Quantity in Packing Groups I, II, and III
Class 8 Corrosive Materials Large Bulk Quantity in Packing Group I
Class 9 Miscellaneous Hazardous Materials Not Subject

Note that a “large bulk quantity” is any quantity greater than 3,000 kg (6,614 pounds) for solids or 3,000 liters (792 gallons) for liquids and gases in a single packaging such as a cargo tank motor vehicle, portable tank, tank car, or other bulk container.