Waste Classification

Characteristics

Examples

Class 9

Materials which present a hazard during transport but which are not included in any other hazard class.

Pump oil
Ammonium sulfite
Dimethylsulfoxide

Combustible Liquid

Liquids that have a flash point of 141 ºF or more but no higher than 200 ºF that do not meet the definition of any other hazard class.

Diesel fuel
Formaldehyde
Kerosene-oil

Corrosive

Materials which indicate a pH other than 7.

Acids and Bases
Corrosive solids
Mercury

Dangerous When Wet

Materials that, by contact with water, are liable to become spontaneously flammable or to give off flammable or toxic gas.

Sodium metal
Potassium ingot
Lithium aluminum hydride

Explosive

Any substance or article, including a device which is designed to function by explosion or by chemical reaction within itself, is able to function in a similar manner even if not designed to function by explosion.

Gunpowder

Flammable Gas

Any material which is a gas at 20 ºC or less and 14.7 psi of pressure which is ignitable at 14.7 psi when in a mixture of 13% or less by volume air; or has a flammable range at 14.7 psi with air of at least 12% regardless of lower limit.

Flammable Liquid

Liquids having a flash point of not more than 60.5 ºC (141 ºF)

Solvents
Alcohols

Flammable Solid

Refers to any of three types: wetted explosives (explosives wetted to suppress explosive properties), self-reactive materials (thermally unstable and that can undergo a strongly exothermic decomposition even without participation of oxygen), or readily combustible solids (may cause a fire through friction, metal powders that can be ignited and react in 10 minutes or less, or show a burning rate faster than 2.2mm per second).

Camphor
Magnesium metal
Red phosphorus

Keep Away From Food

See Poison

Indium-lead fluoroborate
Lead chloride
Trichloroethylene, spent

Non-flammable Gas

Any material or mixture which exerts in the packaging an absolute pressure of 41 psia at 20 ºC and does not meet the definition of Flammable Gas or Poisonous Gas.

Oxidizer

Materials that may, generally by yielding oxygen, cause or enhance the combustion of other materials.

Ammonium nitrate
Potassium chlorate
Potassium permanganate

Poison

Materials, other than gases, which are known to be so toxic to humans to afford a hazard to health during transportation, or which are presumed, from animal testing results, to be toxic to humans.

Arsenic trioxide
Mercury mixtures
Phenol

Poison Gas

Materials which are a gas at 68 ºF or less and a pressure of one atmosphere and which are known to be so toxic to humans as to pose a hazard to health during transportation or are presumed to be toxic to humans.

Chlorine
Methylbromide

Spontaneously Combustible

Pyrophoric materials (can ignite within 5 minutes after air contact) or self-heating materials (can self-heat when in contact with air and without an energy supply).

Activated charcoal

Missouri S&T Regulated Materials

Materials that are not regulated under another category and which fall under the responsibility of the University.

variety