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Table III-1 EPA Compatibility Table

Table III-1. Environmental Protection Agency (EPA) Compatibility Table

EPA has published a list of potentially incompatible wastes, waste components and materials along with the harmful consequences of mixing those materials together. This list does not include every possible hazardous chemical reaction, but should be used as a guide in packaging and storing these materials. The list indicates the potential consequences of the mixing of a Group A material with a Group B material.

For example, mixing any Group 2-A waste, which include reactive metals and metal hydrides, with a Group 2-B waste, which include the Group 1-A alkaline and the Group 1-B acidic wastes, may produce a fire or explosion and the generation of flammable hydrogen gas. Mixing a Group 3-A waste, which includes alcohol’s and water, with a Group 3-B waste, which encompass Groups 1-A, 1-B and Group 3-B listed chemicals, may produce a fire, explosion or heat and the generation of flammable or toxic gases.

These compatibility listings and packaging guides should not be the only information used when packaging or accumulating waste chemicals. RCRA regulations require that wastes should be adequately analyzed by TSD facilities so uncontrolled substances or reactions do not occur. Pay close attention to any waste characterization data you receive on material reactivity and compatibility. There are also other sources of data that may be helpful in determining waste compatibility. SDS’s contain a section devoted to chemical reactivity and incompatibility. The National Fire Protection Association (NFPA) publishes a manual of hazardous chemical reactions which contains over 3,500 documented dangerous chemical reactions.

 

Group 1-A

Group 1-B

Acetylene sludge

Acid sludge

Alkaline caustic liquids

Acid and water

Alkaline cleaner

Battery acid

Alkaline corrosive liquids

Chemical cleaners

Alkaline corrosive battery fluids

Electrolyte, acid

Caustic wastewater

Etching acid liquid or solvent

Lime sludge and other corrosive alkalies

Pickling liquor and other corrosive acids

Lime wastewater

Spent acid

Lime and water

Spent mixed acid

Spent caustic

Spent sulphuric acid

Potential consequences: Heat generation; violent reaction.

Group 2-A    

Sodium

Aluminum    

Lithium

Beryllium    

Calcium

Magnesium    

Zinc powder

Potassium   

 Other reactive metals and metal hydrides

Group 2-B    

Any waste in Group 1-A or 1-B

Potential consequences: Fire or explosion; generation of flammable hydrogen gas.

Group 3-A

Group 3-B

Alcohols

Any concentrated waste in Groups 1-A or 1-B

Water

Calcium

 

Lithium

 

Metal Hydrides

 

Potassium

 

SO2Cl2, SOCl2, PCl3, CH2SiCl2

 

Other water-reactive waste

Potential consequences: Fire, explosion, or heat generation; generation of flammable or toxic gases.

Group 4-A

Group 4-B

Alcohols

Concentrated Group 1-A or 1-B wastes

Aldehydes

Group 2-A wastes

Halogenated hydrocarbons

 

Nitrated hydrocarbons

 

Unsaturated hydrocarbons

 

Other reactive organic compounds and solvents

 

Potential consequences: Fire, explosion or violent reaction.

Group 5-A

Group 5-B

Spent cyanide and sulfide solutions Group

1-B wastes

Potential consequences: Generation of toxic hydrogen cyanide or hydrogen sulfide gas.

Group 6-A

Group 6-B

Chlorates

Concentrated mineral acids

Chlorine

Group 2-A wastes

Chlorites

Group 4-A wastes

Chromic acid

Other flammable and combustible wastes

Hypochlorites

 

Nitrates

 

Nitric acid, fuming

 

Perchlorates

 

Permanganates

 

Peroxides

 

Other strong oxidizers

 

Acetic acid and other organic acids

 

Potential consequences: Fire, explosion, or violent reaction.

Source: 40 CFR 264, Appendix V.