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The Most Dangerous Chemicals:1910.119 Appendix A

By Graphic Products Editorial Staff

If you've already read OSHA's list of hazardous materials then you know that list covers materials from household products to deadly gases. From skin and vision irritants to dangerous environmental exposures—it’s a list of materials that can pose a hazard typically to an individual or small group or area. If you’re looking for the precise appendix listing of the most toxic and reactive highly hazardous chemicals found on earth then you've found the right spot.

Below is Appendix A to 1910.119 of the CFR listing of chemicals that can cause a catastrophic event at or above the threshold quantity.

CHEMICAL nameCAS*TQ**
Acetaldehyde 75-07-0 2500
Acrolein (2-Propenal) 107-02-8 150
Acrylyl Chloride 814-68-6 250
Allyl Chloride 107-05-1 1000
Allylamine 107-11-9 1000
Alkylaluminums Varies 5000
Ammonia, Anhydrous 7664-41-7 10000
Ammonia solutions (>44% ammonia by weight) 7664-41-7 15000
Ammonium Perchlorate 7790-98-9 7500
Ammonium Permanganate 7787-36-2 7500
Arsine (also called Arsenic Hydride) 7784-42-1 100
Bis(Chloromethyl) Ether 542-88-1 100
Boron Trichloride 10294-34-5 2500
Boron Trifluoride 7637-07-2 250
Bromine 7726-95-6 1500
Bromine Chloride 13863-41-7 1500
Bromine Pentafluoride 7789-30-2 2500
Bromine Trifluoride 7787-71-5 15000
3-Bromopropyne (also called Propargyl Bromide) 106-96-7 100
Butyl Hydroperoxide (Tertiary) 75-91-2 5000
Butyl Perbenzoate (Tertiary) 614-45-9 7500
Carbonyl Chloride (see Phosgene) 75-44-5 100
Carbonyl Fluoride 353-50-4 2500
Cellulose Nitrate (concentration >12.6% nitrogen 9004-70-0 2500
Chlorine 7782-50-5 1500
Chlorine Dioxide 10049-04-4 1000
Chlorine Pentrafluoride 13637-63-3 1000
Chlorine Trifluoride 7790-91-2 1000
Chlorodiethylaluminum (also called Diethylaluminum Chloride) 96-10-6 5000
1-Chloro-2,4-Dinitrobenzene 97-00-7 5000
Chloromethyl Methyl Ether 107-30-2 500
Chloropicrin 76-06-2 500
Chloropicrin and Methyl Bromide mixture None 1500
Chloropicrin and Methyl Chloride mixture None 1500
Cumene Hydroperoxide 80-15-9 5000
Cyanogen 460-19-5 2500
Cyanogen Chloride 506-77-4 500
Cyanuric Fluoride 675-14-9 100
Diacetyl Peroxide (Concentration >70%) 110-22-5 5000
Diazomethane 334-88-3 500
Dibenzoyl Peroxide 94-36-0 7500
Diborane 19287-45-7 100
Dibutyl Peroxide (Tertiary) 110-05-4 5000
Dichloro Acetylene 7572-29-4 250
Dichlorosilane 4109-96-0 2500
Diethylzinc 557-20-0 10000
Diisopropyl Peroxydicarbonate 105-64-6 7500
Dilaluroyl Peroxide 105-74-8 7500
Dimethyldichlorosilane 75-78-5 1000
Dimethylhydrazine, 1,1- 57-14-7 1000
Dimethylamine, Anhydrous 124-40-3 2500
2,4-Dinitroaniline 97-02-9 5000
Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%) 1338-23-4 5000
Ethyl Nitrite 109-95-5 5000
Ethylamine 75-04-7 7500
Ethylene Fluorohydrin 371-62-0 100
Ethylene Oxide 75-21-8 5000
Ethyleneimine 151-56-4 1000
Fluorine 7782-41-4 1000
Formaldehyde (Formalin) 50-00-0 1000
Furan 110-00-9 500
Hexafluoroacetone 684-16-2 5000
Hydrochloric Acid, Anhydrous 7647-01-0 5000
Hydrofluoric Acid, Anhydrous 7664-39-3 1000
Hydrogen Bromide 10035-10-6 5000
Hydrogen Chloride 7647-01-0 5000
Hydrogen Cyanide, Anhydrous 74-90-8 1000
Hydrogen Fluoride 7664-39-3 1000
Hydrogen Peroxide (52% by weight or greater) 7722-84-1 7500
Hydrogen Selenide 7783-07-5 150
Hydrogen Sulfide 7783-06-4 1500
Hydroxylamine 7803-49-8 2500
Iron, Pentacarbonyl 13463-40-6 250
Isopropylamine 75-31-0 5000
Ketene 463-51-4 100
Methacrylaldehyde 78-85-3 1000
Methacryloyl Chloride 920-46-7 150
Methacryloyloxyethyl Isocyanate 30674-80-7 100
Methyl Acrylonitrile 126-98-7 250
Methylamine, Anhydrous 74-89-5 1000
Methyl Bromide 74-83-9 2500
Methyl Chloride 74-87-3 15000
Methyl Chloroformate 79-22-1 500
Methyl Ethyl Ketone Peroxide (concentration >60%) 1338-23-4 5000
Methyl Fluoroacetate 453-18-9 100
Methyl Fluorosulfate 421-20-5 100
Methyl Hydrazine 60-34-4 100
Methyl Iodide 74-88-4 7500
Methyl Isocyanate 624-83-9 250
Methyl Mercaptan 74-93-1 5000
Methyl Vinyl Ketone 79-84-4 100
Methyltrichlorosilane 75-79-6 500
Nickel Carbonly (Nickel Tetracarbonyl) 13463-39-3 150
Nitric Acid (94.5% by weight or greater) 7697-37-2 500
Nitric Oxide 10102-43-9 250
Nitroaniline (para Nitroaniline 100-01-6 5000
Nitromethane 75-52-5 2500
Nitrogen Dioxide 10102-44-0 250
Nitrogen Oxides (NO; NO2; N204; N203) 10102-44-0 250
Nitrogen Tetroxide (also called Nitrogen Peroxide) 10544-72-6 250
Nitrogen Trifluoride 7783-54-2 5000
Nitrogen Trioxide 10544-73-7 250
Oleum (65% to 80% by weight; also called Fuming Sulfuric Acid) 8014-95-7 1,000
Osmium Tetroxide 20816-12-0 100
Oxygen Difluoride (Fluorine Monoxide) 7783-41-7 100
Ozone 10028-15-6 100
Pentaborane 19624-22-7 100
Peracetic Acid (concentration >60% Acetic Acid; also called Peroxyacetic Acid) 79-21-0 1000
Perchloric Acid (concentration >60% by weight) 7601-90-3 5000
Perchloromethyl Mercaptan 594-42-3 150
Perchloryl Fluoride 7616-94-6 5000
Peroxyacetic Acid (concentration >60% Acetic Acid; also called Peracetic Acid) 79-21-0 1000
Phosgene (also called Carbonyl Chloride) 75-44-5 100
Phosphine (Hydrogen Phosphide) 7803-51-2 100
Phosphorus Oxychloride (also called Phosphoryl Chloride) 10025-87-3 1000
Phosphorus Trichloride 7719-12-2 1000
Phosphoryl Chloride (also called Phosphorus Oxychloride) 10025-87-3 1000
Propargyl Bromide 106-96-7 100
Propyl Nitrate 627-3-4 2500
Sarin 107-44-8 100
Selenium Hexafluoride 7783-79-1 1000
Stibine (Antimony Hydride) 7803-52-3 500
Sulfur Dioxide (liquid) 7446-09-5 1000
Sulfur Pentafluoride 5714-22-7 250
Sulfur Tetrafluoride 7783-60-0 250
Sulfur Trioxide (also called Sulfuric Anhydride) 7446-11-9 1000
Sulfuric Anhydride (also called Sulfur Trioxide) 7446-11-9 1000
Tellurium Hexafluoride 7783-80-4 250
Tetrafluoroethylene 116-14-3 5000
Tetrafluorohydrazine 10036-47-2 5000
Tetramethyl Lead 75-74-1 1000
Thionyl Chloride 7719-09-7 250
Trichloro (chloromethyl) Silane 1558-25-4 100
Trichloro (dichlorophenyl) Silane 27137-85-5 2500
Trichlorosilane 10025-78-2 5000
Trifluorochloroethylene 79-38-9 10000
Trimethyoxysilane 2487-90-3 1500

*Chemical Abstract Service Number.
**Threshold Quantity in Pounds (Amount necessary to be covered by this standard).

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