Chemical Threats to Clean Air and Homeland Security

According to the EPA, the 140 toxic and flammable chemicals listed below pose the greatest risk to human health and the environment. In addition to their toxicity and flammability, these materials are also produced and used commercially in large volume. The chemicals are listed by order of their CAS Number. If you're a HazMat Zone Subscriber, you'll be able to link directly to the Genium MSDS for each of these materials.

The materials on the list underlined in black are linked to the Genium Hazard Overview and MSDS at the HazMat Zone. Clicking on the materials underlined in red will take you to the SIRI website's page of vendor-supplied MSDSs for those types of products.

This chemical data resource makes an excellent training and reference tool for any organization responsible for protecting a municipality, county, or state from the dangers of accidental chemical release or intentional acts of chemical terrorism.

Toxic

CAS No. Material 50-00-0 Formaldehyde (solution) 57-14-7 1,1-Dimethylhydrazine [Hydrazine, 1,1- dimethyl-] 60-34-4 Methyl hydrazine [Hydrazine, methyl-] 67-66-3 Chloroform [Methane, trichloro-] 74-87-3 Methyl chloride [Methane, chloro-] 74-90-8 Hydrocyanic acid 74-93-1 Methyl mercaptan [Methanethiol] 75-15-0 Carbon disulfide 75-21-8 Ethylene oxide [Oxirane] 75-44-5 Phosgene [Carbonic dichloride] 75-55-8 Propyleneimine [Aziridine, 2-methyl- ] 75-56-9 Propylene oxide [Oxirane, methyl-] 75-74-1 Tetramethyllead [Plumbane, tetramethyl-] 75-77-4 Trimethylchlorosilane [Silane, chlorotrimethyl-] 75-78-5 Dimethyldichlorosilane [Silane, dichlorodimethyl-] 75-79-6 Methyltrichlorosilane [Silane, trichloromethyl-] 78-82-0 Isobutyronitrile [Propanenitrile, 2- methyl-] 79-21-0 Peracetic acid [Ethaneperoxoic acid] 79-22-1 Methyl chloroformate [Carbonochloridic acid, methylester] 91-08-7 Toluene 2,6- diisocyanate [Benzene, 1,3- diisocyanato-2-methyl- ] 106-89-8 Epichlorohydrin [Oxirane, (chloromethyl)-] 107-02-8 Acrolein [2-Propenal]. 107-11-9 Allylamine [2-Propen-1- amine] 107-12-0 Propionitrile [Propanenitrile] 107-13-1 Acrylonitrile [2- Propenenitrile] 107-15-3 Ethylenediamine [1,2- Ethanediamine] 107-18-6 Allyl alcohol [2- Propen-1-ol] 107-30-2 Chloromethyl methyl ether [Methane, chloromethoxy-] 108-05-4 Vinyl acetate monomer [Acetic acid ethenyl ester] 108-23-6 Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester] 108-91-8 Cyclohexylamine [Cyclohexanamine] 109-61-5 Propyl chloroformate [Carbonochloridic acid, propylester] 110-00-9 Furan 110-89-4 Piperidine 123-73-9 Crotonaldehyde, (E)- [2-Butenal, (E)-] 126-98-7 Methacrylonitrile [2- Propenenitrile, 2- methyl-] 151-56-4 Ethyleneimine [Aziridine] 302-01-2 Hydrazine 353-42-4 Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro[oxybis[meth ane]]-, T-4- 506-77-4 Cyanogen chloride 509-14-8 Tetranitromethane [Methane, tetranitro- ] 542-88-1 Chloromethyl ether [Methane, oxybis[chloro-] 556-64-9 Methyl thiocyanate [Thiocyanic acid, methyl ester] 584-84-9 Toluene 2,4- diisocyanate [Benzene, 2,4- diisocyanato-1-methyl- ] 594-42-3 Perchloromethylmercapt an [Methanesulfenyl chloride, trichloro-] 624-83-9 Methyl isocyanate [Methane, isocyanato- ] 814-68-6 Acrylyl chloride [2- Propenoyl chloride] 4170-30-3 Crotonaldehyde [2- Butenal] 7446-09-5 Sulfur dioxide (anhydrous) 7446-11-9 Sulfur trioxide 7550-45-0 Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-] 7637-07-2 Boron trifluoride [Borane, trifluoro-] 7647-01-0 Hydrochloric acid (conc 37% or greater) 7647-01-0 Hydrogen chloride (anhydrous) [Hydrochloric acid] 7664-39-3 Hydrogen fluoride/ Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] 7664-41-7 Ammonia (anhydrous) 7664-41-7 Ammonia (conc 20% or greater) 7697-37-2 Nitric acid (conc 80% or greater) 7719-12-2 Phosphorus trichloride [Phosphorous trichloride] 7726-95-6 Bromine 7782-41-4 Fluorine 7782-50-5 Chlorine 7783-06-4 Hydrogen sulfide 7783-07-5 Hydrogen selenide 7783-60-0 Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] 7784-34-1 Arsenous trichloride 7784-42-1 Arsine 7803-51-2 Phosphine 8014-95-7 Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] 10025-87-3 Phosphorus oxychloride [Phosphoryl chloride] 10049-04-4 Chlorine dioxide [Chlorine oxide (ClO2)] 10102-43-9 Nitric oxide [Nitrogen oxide (NO)] 10294-34-5 Boron trichloride [Borane, trichloro-] 13463-39-3 Nickel carbonyl 13463-40-6 Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)- ] 19287-45-7 Diborane 26471-62-5 Toluene diisocyanate (unspecified isomer) [Benzene, 1,3- diisocyanatomethyl- 1].

Flammable

CAS No. Material 60-29-7 Ethyl ether [Ethane, 1,1[prime]-oxybis-] 74-82-8 Methane 74-84-0 Ethane 74-85-1 Ethylene [Ethene] 74-86-2 Acetylene [Ethyne] 74-89-5 Methylamine [Methanamine] 74-98-6 Propane 74-99-7 Propyne [1-Propyne] 75-00-3 Ethyl chloride [Ethane, chloro- ] 75-01-4 Vinyl chloride [Ethene, chloro- ] 75-02-5 Vinyl fluoride [Ethene, fluoro- ] 75-04-7 Ethylamine [Ethanamine] 75-07-0 Acetaldehyde 75-08-1 Ethyl mercaptan [Ethanethiol] 75-19-4 Cyclopropane 75-28-5 Isobutane [Propane, 2-methyl] 75-29-6 Isopropyl chloride [Propane, 2- chloro-] 75-31-0 Isopropylamine [2-Propanamine] 75-35-4 Vinylidene chloride [Ethene, 1,1-dichloro-] 75-37-6 Difluoroethane [Ethane, 1,1- difluoro-] 75-38-7 Vinylidene fluoride [Ethene, 1,1-difluoro-] 75-50-3 Trimethylamine [Methanamine, N, N-dimethyl-] 75-76-3 Tetramethylsilane [Silane, tetramethyl-] 78-78-4 Isopentane [Butane, 2-methyl-] 78-79-5 Isoprene [1,3,-Butadiene, 2- methyl-] 79-38-9 Trifluorochloroethylene [Ethene, chlorotrifluoro-] 106-97-8 Butane 106-98-9 1-Butene 106-99-0 1,3-Butadiene 107-00-6 Ethyl acetylene [1-Butyne] 107-01-7 2-Butene 107-25-5 Vinyl methyl ether [Ethene, methoxy-] 107-31-3 Methyl formate [Formic acid, methyl ester] 109-66-0 Pentane 109-67-1 1-Pentene 109-92-2 Vinyl ethyl ether [Ethene, ethoxy-] 109-95-5 Ethyl nitrite [Nitrous acid, ethyl ester] 115-07-1 Propylene [1-Propene] 115-10-6 Methyl ether [Methane, oxybis- ] 115-11-7 2-Methylpropene [1-Propene, 2- methyl-] 116-14-3 Tetrafluoroethylene [Ethene, tetrafluoro-] 124-40-3 Dimethylamine [Methanamine, N- methyl-] 460-19-5 Cyanogen [Ethanedinitrile] 463-49-0 Propadiene [1,2-Propadiene] 463-58-1 Carbon oxysulfide [Carbon oxide sulfide (COS)] 463-82-1 2,2-Dimethylpropane [Propane, 2,2-dimethyl-] 504-60-9 1,3-Pentadiene 557-98-2 2-Chloropropylene [1-Propene, 2-chloro-] 563-45-1 3-Methyl-1-butene 563-46-2 2-Methyl-1-butene 590-18-1 2-Butene-cis 590-21-6 1-Chloropropylene [1-Propene, 1-chloro-] 598-73-2 Bromotrifluorethylene [Ethene, bromotrifluoro-] 624-64-6 2-Butene-trans [2-Butene, (E)] 627-20-3 2-Pentene, (Z)- 646-04-8 2-Pentene, (E)- 689-97-4 Vinyl acetylene [1-Buten-3- yne] 1333-74-0 Hydrogen 4109-96-0 Dichlorosilane [Silane, dichloro-] 7791-21-1 Chlorine monoxide [Chlorine oxide] 7803-62-5 Silane 10025-78-2 Trichlorosilane [Silane,trichloro-] 25167-67-3 Butene