Classification of High-Hazard Contents | UpCodes (2024)

High-hazard contents shall include materialsdefined as hazardous material in Chapter 3, whether stored,used, or handled. [400:4.2.1.1]

High-hazard Level 1 contents shall include materials that present a detonation hazard, including, but not limited to, the following hazard categories:

1. Class 4 oxidizers
2. Detonable pyrophoric solids or liquids
3. Class 3 detonable and Class 4 unstable (reactive) solids,liquids, or gases
4. Detonable organic peroxides

[400:4.2.1.2.1]

High-hazard Level 2 contents shall include materials that present a deflagration hazard or a hazard from accelerated burning, including, but not limited to, the following hazard categories:

1. Combustible dusts that are stored, used, or generated in a manner that creates a severe fire or explosion hazard
2. Class I organic peroxides
3. Class 3 solid or liquid oxidizers that are used or stored innormally open containers or systems or in closed containers or systems at gauge pressures of more than 15 psi(103.4 kPa)
4. Flammable gases
5. Flammable cryogenic fluids
6. Nondetonable pyrophoric solids, liquids, or gases
7. Class 3 nondetonable unstable (reactive) solids, liquids,or gases
8. Class 3 water-reactive solids and liquids

[400:4.2.1.2.2]

High-hazard Level 3 contents shall include materials that readily support combustion or present a physical hazard, including, but not limited to, the following hazard categories:

1. Flammable solids, other than dusts classified as high-hazard Level 2, that are stored, used, or generated in a manner that creates a high fire hazard
2. Class II and Class III organic peroxides
3. Class 2 solid or liquid oxidizers
4. Class 3 solid or liquid oxidizers that are used or stored in normally closed containers or systems at gauge pressures of less than 15 psi (103.4 kPa)
5. Class 2 unstable (reactive) materials
6. Class 2 water-reactive solids, liquids, or gases
7. Oxidizing gases
8. Oxidizing cryogenic fluids

[400:4.2.1.2.3]

High-hazard Level 4 contents shall include materials that are acute health hazards, including, but not limited to, the following hazard categories:

1. Corrosive solids, liquids, or gases
2. Highly toxic solids, liquids, or gases
3. Toxic solids, liquids, or gases

[400:4.2.1.2.4]