RCRA’s Chemical Waste Compatibility List

The mixing of Group A materials with Group B materials may have the potentialconsequences noted.________________________________________________________________________Group 1-A Group 1-BAcetylene sludge Acid sludgeAlkaline caustic liquids Acid and waterAlkaline cleaner Battery acidAlkaline corrosive liquids Chemical cleanersAlkaline corrosive battery fluid Electrolyte, acidCaustic wastewater Etching acid liquid or solventLime sludge and other corrosive alkalies Pickling liquor & other corrosive acidsLime wastewater Spent acidLime and water Spent mixed acidSpent caustic Spent sulfuric acid

Potential consequences: Heat generation; violent reaction_____________________________________________________________________Group 2-A Group 2-BAluminum Any waste in Group 1-A or 1-BBerylliumCalciumLithiumMagnesiumPotassiumsodiumZinc powderOther reactive metals and metal hydroxides

Potential consequences: Fire or explosion; generation of flammable hydrogen gas________________________________________________________________________Group 3-A Group 3-BAlcohols Any concentrated waste in Groups1A or 1BWater Calcium

LithiumMetal hydridesPotassiumSO2Cl2, SOCl2, PCl3, CH3SiCl3Other water-reactive waste

Potential consequences: Fire, explosion, or heat generation; generation offlammable or toxic gases

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Group 4-A Group 4-BAlcohols Concentrated Group 1-A or 1-B wastesAldehydes Group 2-A wastesHalogenated hydrocarbonsNitrated hydrocarbonsUnsaturated hydrocarbonsOther reactive organic compounds & solvents

Potential consequences: Fire, explosion, or violent reaction_______________________________________________________________________Group 5-A Group 5-BSpent cyanide and sulfide solutions Group 1-B wastes

Potential consequences: Generation of toxic hydrogen cyanide or hydrogen sulfide gas________________________________________________________________________Group 6-A Group 6-BChlorates Acetic acid and other organic acidsChlorine Concentrated mineral acidsChlorites Group 2-A wastesChromic acid Group 5-A wastesHypochlorites Other flammable and combustible wastesNitratesNitric acid, fumingPerchloratesPermanganatesPeroxidesOther strong oxidizers

Potential consequences: Fire, explosion, or violent reaction_________________________________________________________________________