Del. Admin. Code tit. 7, 1000, 1300, 1302, pt. 265, Waste Treatment, Storage, and Disposal Facilities, subpt. FF, app V
Many hazardous wastes, when mixed with other waste or materials at a hazardous waste facility, can produce effects which are harmful to human health and the environment, such as
Below are examples of potentially incompatible wastes, waste components, and materials, along with the harmful consequences which result from mixing materials in one group with materials in another group. The list is intended as a guide to owners or operators of treatment, storage, and disposal facilities, and to enforcement and permit granting officials, to indicate the need for special precautions when managing these potentially incompatible waste materials or components.
This list is not intended to be exhaustive. An owner or operator must, as the regulations require, adequately analyze his wastes so that he can avoid creating uncontrolled substances or reactions of the type listed below, whether they are listed below or not.
It is possible for potentially incompatible wastes to be mixed in a way that precludes a reaction (e.g., adding acid to water rather than water to acid) or that neutralizes them (e.g., a strong acid mixed with a strong base), or that controls substances produced (e.g., by generating flammable gases in a closed tank equipped so that ignition cannot occur, and burning the gases in an incinerator).
In the lists below, the mixing of a Group A material with a Group B material may have the potential consequence as noted.
| Group 1A | Group 1B |
| Acetylene sludge Alkaline caustic liquids Alkaline cleaner Alkaline corrosive liquids Alkaline corrosive battery fluid Caustic wastewater Lime sludge and other corrosive alkalies Lime wastewater Lime and water Spent caustic | Acid sludge Acid and water Battery acid Chemical cleaners Electrolyte, acid Etching acid liquid or solvent Pickling liquor and other corrosive acids Spent acid Spent mixed acid Spent sulfuric acid |
Potential consequences: Heat generation; violent reaction.
| Group 2A | Group 2B |
| Aluminum Beryllium Calcium Lithium Magnesium Potassium Sodium Zinc powder Other reactive metals and metal hydrides | Any waste in Group 1A or 1B |
Potential consequences: Fire or explosion; generation of flammable hydrogen gas.
| Group 3A | Group 3B |
| Alcohols Water | Any concentrated waste in Groups 1A or 1B Calcium Lithium Metal hydrides Potassium SO2Cl2, SOCl2, PCl3, CH3SiCl3 Other water-reactive waste |
Potential consequences: Fire, explosion, or heat generation; generation of flammable or toxic gases.
| Group 4A | Group 4B |
| Alcohols Aldehydes Halogenated hydrocarbons Nitrated hydrocarbons Unsaturated hydrocarbons Other reactive organic compounds and solvents | Concentrated Group 4A or 1B wastes Group 2A wastes |
Potential consequences: Fire, explosion, or violent reaction.
| Group 5A | Group 5B |
| Spent cyanide and sulfide solutions | Group 1B wastes |
Potential consequences: Generation of toxic hydrogen cyanide or hydrogen sulfide gas.
| Group 6A | Group 6B |
| Chlorates Chlorine Chlorites Chromic acid Hyphochlorites Nitrates Nitric acid, fuming Perchlorates Permanganates Peroxides Other strong oxidizers | Acetic acid and other organic acids Concentrated mineral acids Group 2A wastes Group 4A wastes Other flammable and combustible wastes |
Potential consequences: Fire, explosion, or violent reaction.
Source: "Law, Regulations, and Guidelines for Handling of Hazardous Waste." California Department of Health, February 1975.
Appendix VI to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X
| COMPOUND NAME | CAS NUMBER |
| Acetaldol | 107-89-1 |
| Acetamide | 60-35-5 |
| 2-Acetylaminofluorene | 53-96-3 |
| 3-Acetyl-5-hydroxypiperidine | |
| 3-Acetylpiperidine | 618-42-8 |
| 1-Acetyl-2-thiourea | 591-08-2 |
| Acrylamide | 79-06-1 |
| Acrylic acid | 79-10-7 |
| Adenine | 73-24-5 |
| Adipic acid | 124-04-9 |
| Adiponitrile | 111-69-3 |
| Alachlor | 15972-60-8 |
| Aldicarb | 116-06-3 |
| Ametryn | 834-12-8 |
| 4-Aminobiphenyl | 92-67-1 |
| 4-Aminopyridine | 504-24-5 |
| Aniline | 62-53-3 |
| o-Anisidine | 90-04-0 |
| Anthraquinone | 84-65-1 |
| Atrazine | 1912-24-9 |
| Benzenearsonic acid | 98-05-5 |
| Benzenesulfonic acid | 98-11-3 |
| Benzidine | 92-87-5 |
| Benzo(a)anthracene | 56-55-3 |
| Benzo(k)fluoranthene | 207-08-9 |
| Benzoic acid | 65-85-0 |
| Benzo(g,h,i)perylene | 191-24-2 |
| Benzo(a)pyrene | 50-32-8 |
| Benzyl alcohol | 100-51-6 |
| gamma-BHC | 58-89-9 |
| Bis(2-ethylhexyl)phthalate | 117-81-7 |
| Bromochloromethyl acetate | |
| Bromoxynil | 1689-84-5 |
| Butyric acid | 107-92-6 |
| Caprolactam (hexahydro-2H-azepin-2-one) | 105-60-2 |
| Catechol (o-dihydroxybenzene) | 120-80-9 |
| Cellulose | 9004-34-6 |
| Cell wall | |
| Chlorhydrin (3-Chloro-1,2-propanediol) | 96-24-2 |
| Chloroacetic acid | 79-11-8 |
| 2-Chloroacetophenone | 93-76-5 |
| p-Chloroaniline | 106-47-8 |
| p-Chlorobenzophenone | 134-85-0 |
| Chlorobenzilate | 510-15-6 |
| p-Chloro-m-cresol (6-chloro-m-cresol) | 59-50-7 |
| 3-Chloro-2,5-diketopyrrolidine | |
| Chloro-1,2-ethane diol | |
| 4-Chlorophenol | 106-48-9 |
| Chlorophenol polymers (2-chlorophenol & 4-chlorophenol) | 95-57-8 & 106-48-9 |
| 1-(o-Chlorophenyl)thiourea | 5344-82-1 |
| Chrysene | 218-01-9 |
| Citric acid | 77-92-9 |
| Creosote | 8001-58-9 |
| m-Cresol | 108-39-4 |
| o-Cresol | 95-48-7 |
| p-Cresol | 106-44-5 |
| Cresol (mixed isomers) | 1319-77-3 |
| 4-Cumylphenol | 27576-86 |
| Cyanide | 57-12-5 |
| 4-Cyanomethyl benzoate | |
| Diazinon | 333-41-5 |
| Dibenzo(a,h)anthracene | 53-70-3 |
| Dibutylphthalate | 84-74-2 |
| 2,5-Dichloroaniline (N,N'-dichloroaniline) | 95-82-9 |
| 2,6-Dichlorobenzonitrile11 | 1194-65-6 |
| 2,6-Dichloro-4-nitroaniline | 99-30-9 |
| 2,5-Dichlorophenol | 333-41-5 |
| 3,4-Dichlorotetrahydrofuran | 3511-19 |
| Dichlorvos (DDVP) | 62-73-7 |
| Diethanolamine | 111-42-2 |
| N,N-Diethylaniline | 91-66-7 |
| Diethylene glycol | 111-46-6 |
| Diethylene glycol dimethyl ether (dimethyl Carbitol) | 111-96-6 |
| Diethylene glycol monobutyl ether (butyl Carbitol) | 112-34-5 |
| Diethylene glycol monoethyl ether acetate (Carbitol acetate) | 112-15-2 |
| Diethylene glycol monoethyl ether (Carbitol Cellosolve) | 111-90-0 |
| Diethylene glycol monomethyl ether (methyl Carbitol) | 111-77-3 |
| N,N'-Diethylhydrazine | 1615-80-1 |
| Diethyl (4-methylumbelliferyl) thionophosphate | 299-45-6 |
| Diethyl phosphorothioate | 126-75-0 |
| N,N'-Diethylpropionamide | 15299-99-7 |
| Dimethoate | 60-51-5 |
| 2,3-Dimethoxystrychnidin-10-one | 357-57-3 |
| 4-Dimethylaminoazobenzene | 60-11-7 |
| 7,12-Dimethylbenz(a)anthracene | 57-97-6 |
| 3,3-Dimethylbenzidine | 119-93-7 |
| Dimethylcarbamoyl chloride | 79-44-7 |
| Dimethyldisulfide | 624-92-0 |
| Dimethylformamide | 68-12-2 |
| 1,1-Dimethylhydrazine | 57-14-7 |
| Dimethylphthalate | 131-11-3 |
| Dimethylsulfone | 67-71-0 |
| Dimethylsulfoxide | 67-68-5 |
| 4,6-Dinitro-o-cresol | 534-52-1 |
| 1,2-Diphenylhydrazine | 122-66-7 |
| Dipropylene glycol (1,1'-oxydi-2-propanol) | 110-98-5 |
| Endrin | 72-20-8 |
| Epinephrine | 51-43-4 |
| mono-Ethanolamine | 141-43-5 |
| Ethyl carbamate (urethane) | 5-17-96 |
| Ethylene glycol | 107-21-1 |
| Ethylene glycol monobutyl ether (butyl Cellosolve) | 111-76-2 |
| Ethylene glycol monoethyl ether (Cellosolve) | 110-80-5 |
| Ethylene glycol monoethyl ether acetate (Cellosolve acetate) | 111-15-9 |
| Ethylene glycol monomethyl ether (methyl Cellosolve) | 109-86-4 |
| Ethylene glycol monophenyl ether (phenyl Cellosolve) | 122-99-6 |
| Ethylene glycol monopropyl ether (propyl Cellosolve) | 2807-30-9 |
| Ethylene thiourea (2-imidazolidinethione) | 9-6-4-5-7 |
| 4-Ethylmorpholine | 100-74-3 |
| 3-Ethylphenol | 620-17-7 |
| Fluoroacetic acid, sodium salt | 62-74-8 |
| Formaldehyde | 50-00-0 |
| Formamide | 75-12-7 |
| Formic acid | 64-18-6 |
| Fumaric acid | 110-17-8 |
| Glutaric acid | 110-94-1 |
| Glycerin (Glycerol) | 56-81-5 |
| Glycidol | 556-52-5 |
| Glycinamide | 598-41-4 |
| Glyphosate | 1071-83-6 |
| Guthion | 86-50-0 |
| Hexamethylene-1,6-diisocyanate (1,6-diisocyanatohexane) | 822-06-0 |
| Hexamethyl phosphoramide | 680-31-9 |
| Hexanoic acid | 142-62-1 |
| Hydrazine | 302-01-2 |
| Hydrocyanic acid | 74-90-8 |
| Hydroquinone | 123-31-9 |
| Hydroxy-2-propionitrile (hydracrylonitrile) | 109-78-4 |
| Indeno (1,2,3-cd) pyrene | 193-39-5 |
| Lead acetate | 301-04-2 |
| Lead subacetate (lead acetate, monobasic) | 1335-32-6 |
| Leucine | 61-90-5 |
| Malathion | 121-75-5 |
| Maleic acid | 110-16-7 |
| Maleic anhydride | 108-31-6 |
| Mesityl oxide | 141-79-7 |
| Methane sulfonic acid | 75-75-2 |
| Methomyl | 16752-77-5 |
| p-Methoxyphenol | 150-76-5 |
| Methyl acrylate | 96-33-3 |
| 4,4'-Methylene-bis-(2-chloroaniline) | 101-14-4 |
| 4,4'-Methylenediphenyl diisocyanate (diphenyl methane diisocyanate) | 101-68-8 |
| 4,4'-Methylenedianiline | 101-77-9 |
| Methylene diphenylamine (MDA) | |
| 5-Methylfurfural | 620-02-0 |
| Methylhydrazine | 60-34-4 |
| Methyliminoacetic acid | |
| Methyl methane sulfonate | 66-27-3 |
| 1-Methyl-2-methoxyaziridine | |
| Methylparathion | 298-00-0 |
| Methyl sulfuric acid (sulfuric acid, dimethyl ester) | 77-78-1 |
| 4-Methylthiophenol | 106-45-6 |
| Monomethylformamide (N-methylformamide) | 123-39-7 |
| Nabam | 142-59-6 |
| alpha-Naphthol | 90-15-3 |
| beta-Naphthol | 135-19-3 |
| alpha-Naphthylamine | 134-32-7 |
| beta-Naphthylamine | 91-59-8 |
| Neopentyl glycol (dimethylpropane) | 126-30-7 |
| Niacinamide | 98-92-0 |
| o-Nitroaniline | 88-74-4 |
| Nitroglycerin | 55-63-0 |
| 2-Nitrophenol | 88-75-5 |
| 4-Nitrophenol | 100-02-7 |
| N-Nitrosodimethylamine | 62-75-9 |
| Nitrosoguanidine | 674-81-7 |
| N-Nitroso-n-methylurea | 684-93-5 |
| N-Nitrosomorpholine (4-nitrosomorpholine) | 59-89-2 |
| Oxalic acid | 144-62-7 |
| Parathion | 56-38-2 |
| Pentaerythritol | 115-77-5 |
| Phenacetin | 62-44-2 |
| Phenol | 108-95-2 |
| Phenylacetic acid | 103-82-2 |
| m-Phenylene diamine | 108-45-2 |
| o-Phenylene diamine | 95-54-5 |
| p-Phenylene diamine | 106-50-3 |
| Phenyl mercuric acetate | 62-38-4 |
| Phorate | 298-02-2 |
| Phthalic anhydride | 85-44-9 |
| alpha-Picoline (2-methyl pyridine) | 109-06-8 |
| 1,3-Propane sultone | 1120-71-4 |
| beta-Propiolactone | 57-57-8 |
| Proporur (Baygon) | |
| Propylene glycol | 57-55-6 |
| Pyrene | 129-00-0 |
| Pyridinium bromide | 39416-48-3 |
| Quinoline | 91-22-5 |
| Quinone (p-benzoquinone) | 106-51-4 |
| Resorcinol | 108-46-3 |
| Simazine | 122-34-9 |
| Sodium acetate | 127-09-3 |
| Sodium formate | 141-53-7 |
| Strychnine | 57-24-9 |
| Succinic acid | 110-15-6 |
| Succinimide | 123-56-8 |
| Sulfanilic acid | 121-47-1 |
| Terephthalic acid | 100-21-0 |
| Tetraethyldithiopyrophosphate | 3689-24-5 |
| Tetraethylenepentamine | 112-57-2 |
| Thiofanox | 39196-18-4 |
| Thiosemicarbazide | 79-19-6 |
| 2,4-Toluenediamine | 95-80-7 |
| 2,6-Toluenediamine | 823-40-5 |
| 3,4-Toluenediamine | 496-72-0 |
| 2,4-Toluene diisocyanate | 584-84-9 |
| p-Toluic acid | 99-94-5 |
| m-Toluidine | 108-44-1 |
| 1,1,2-Trichloro-1,2,2-trifluoroethane | 76-13-1 |
| Triethanolamine | 102-71-6 |
| Triethylene glycol dimethyl ether | |
| Tripropylene glycol | 24800-44-0 |
| Warfarin | 81-81-2 |
| 3,4-Xylenol (3,4-dimethylphenol) | 95-65-8 |
Del. Admin. Code tit. 7, 1000, 1300, 1302, pt. 265, Waste Treatment, Storage, and Disposal Facilities, subpt. FF, app V