Group A
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Group B
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Group 1-A
- Bases
- Potential consequences: Heat generation; violent reaction
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Group 1-B
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Group 2-A
- Aluminum
- Beryllium
- Calcium
- Lithium
- Magnesium
- Potassium
- Sodium
- Zinc powder
- Other reactive metals and metal hydrides
- Potential consequences: Fire, Explosion, or generation of flammable hydrogen gas.
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Group 2-B
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Group 3-A
- Alcohols
- Water
- Potential consequences: Fire, Explosion, or heat generation:
generation of flammable or toxic gases.
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Group 3-B
- Any Concentrated Acids or Bases
- Calcium
- Lithium
- Magnesium
- Sodium
- Zinc Powder
- Any Reactive Metals and Metal Hydrides
- Potassium
- Sulfonyl chloride
- Thionyl chloride
- Phosphorus trichloride
- Methyl trichloride
- Methyl trichlorosilane
- Other water-reactive waste
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Group 4-A
- Alcohols
- Aldehydes
- Halogenated hydrocarbons
- Nitrated hydrocarbons
- Unsaturated hydrocarbons
- Other organic compounds and solvents
- Potential consequences: Fire, Explosion, or violent reaction.
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Group 4-B
- Any Concentrated Acids or Basses
- Reactive Metals and Metal Hydrides
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Group 5-A
- Cyanide's and sulfide's
- Potential consequences: Generation of toxic hydrogen cyanide or hydrogen sulfide gas.
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Group 5-B
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Group 6-A
- Chlorates
- Chlorine
- Chlorites
- chromic acid
- Hypochlorites
- Nitrates
- Nitric acid, fuming
- Perchlorates
- Permanganates
- Peroxides
- Other strong oxidizers
- Potential consequences: Fire, Explosion, or violent reaction.
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Group 6-B
- Acetic acid and other organic acids
- Concentrated mineral acids
- Reactive Metals and Metal Hydrides
- Organic Compounds and Solvents
- Other flammable and combustible chemicals
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The following two groups are added to facilitate the economical disposal of the wastes. They are not necessarily reactive.
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Group 7-A
- Heavy metal Compounds containing arsenic, barium, cadmium, chromium, lead, selenium, silver
- Polychorlinated biphenyls (PCBs) Dioxins
- Mercury Containing Compounds
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Group 7-B
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Group 8-A
- Polychlorinated biphenyls (PCBs)
- Dioxins
- Mercury Containing Compounds
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Group 8-B
- All other chemicals and each other
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