Group A and B incompatible chemicals list

Group 1-A

• Bases
• Potential consequences:  Heat generation; violent reaction

Group 1-B

• Acids

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.

Group 2-B

• Any Acid or Bases

Group 3-A

• Alcohols
• Water
• Potential consequences: Fire, Explosion, or heat generation:
  generation of flammable or toxic gases.

• 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

Group 4-A

• Alcohols
• Aldehydes
• Halogenated hydrocarbons
• Nitrated hydrocarbons
• Unsaturated hydrocarbons
• Other organic compounds and solvents
• Potential consequences:  Fire, Explosion, or violent reaction.

Group 4-B

• Any Concentrated Acids or Basses
• Reactive Metals and Metal Hydrides

Group 5-A

• Cyanide's and sulfide's
• Potential consequences:  Generation of toxic hydrogen cyanide or hydrogen sulfide gas.

Group 5-B

• Any Acids

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.

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

The following two groups are added to facilitate the economical disposal of the wastes.  They are not necessarily reactive.

Group 7-A

• Heavy metal Compounds containing arsenic, barium, cadmium, chromium, lead, selenium, silver
• Polychorlinated biphenyls (PCBs) Dioxins
• Mercury Containing Compounds

Group 7-B

• Flammable Liquids

Group 8-A

• Polychlorinated biphenyls (PCBs)
• Dioxins
• Mercury Containing Compounds

Group 8-B

• All other chemicals and each other