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APPENDIX EOSHA 1910 AND EPA HAZARDOUS CHEMICALS LISTList of Highly Hazardous Chemicals, Toxics and Reactives.

(Mandatory) (OSHA 1910.119, Appendix A)

This Appendix contains a listing of toxic and reactive highly hazardous chemicals that present a potential for a catastrophicevent at or above the threshold quantity.

CHEMICAL NAME CAS No.

a

Total Quantity (lbs.)

b

Acetaldehyde 75-07-0 2,500Acrolein (2-Propenal) 107-02-8 150 Acrylyl Chloride 814-68-6 250Allyl Chloride 107-05-1 1,000 Allylamine 107-11-9 1,000Alkylaluminums Varies 5,000Ammonia, Anhydrous 7664-41-7 10,000 Ammonia solutions (> 44% ammonia by weight) 7664-41-7 15,000Ammonium Perchlorate 7790-98-9 7,500Ammonium Permanganate 7787-36-2 7,500Arsine (also called Arsenic Hydride) 7784-42-1 100Bis(Chloromethyl) Ether 542-88-1 100 Boron Trichloride 10294-34-5 2,500 Boron Trifluoride 7637-07-2 250Bromine 7726-95-6 1,500Bromine Chloride 13863-41-7 1,500Bromine Pentafluoride 7789-30-2 2,500Bromine Trifluoride 7787-71-5 15,0003-Bromopropyne (also called Propargyl Bromide) 106-96-7 100Butyl Hydroperoxide (Tertiary) 75-91-2 5,000Butyl Perbenzoate (Tertiary) 614-45-9 7,500Carbonyl Chloride (see Phosgene) 75-44-5 100Carbonyl Fluoride 353-50-4 2,500Cellulose Nitrate (concentration > 12.6% nitrogen) 9004-70-0 2,500Chlorine 7782-50-5 1,500Chlorine Dioxide 10049-04-4 1,000Chlorine Pentrafluoride 13637-63-3 1,000Chlorine Trifluoride 7790-91-2 1,000Chloromethyl Methyl Ether 107-30-2 500Chloropicrin 76-06-2 500Chloropicrin and Methyl Bromide mixture None 1,500Chloropicrin and Methyl Chloride mixture None 1,500 Cumene Hydroperoxide 80-15-9 5,000Cyanogen 460-19-5 2,500Cyanogen Chloride 506-77-4 500Cyanuric Fluoride 675-14-9 100Diacetyl Peroxide (concentration > 70%) 10-22-5 5,000Diazomethane 334-88-3 500Dibenzoyl Peroxide 94-36-0 7,500Diborane 19287-45-7 100Dibutyl Peroxide (Tertiary) 110-05-4 5,000Dichloro Acetylene 7572-29-4 250

a

Chemical Abstract Service Number

b

Threshold Quantity in Pounds (Amount necessary to be covered by this standard.)

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Dichlorosilane 4109-96-0 2,500Diethylzinc 57-20-0 10,000Diisopropyl Peroxydicarbonate 105-64-6 7,500Dilauroyl Peroxide 105-74-8 7,500Dimethyldichlorosilane 75-78-5 1,000Dimethylhydrazine, 1,1- 57-14-7 1,000Dimethylamine, Anhydrous 124-40-3 2,5002,4-Dinitroaniline 97-02-9 5,000Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration > 60%)

1338-23-4 5,000

thyl Nitrite 109-95-5 5,000Ethylamine 75-04-7 7,500Ethylene Fluorohydrin 371-62-0 100Ethylene Oxide 75-21-8 5,000Ethyleneimine 151-56-4 1,000Fluorine 7782-41-4 1,000Formaldehyde (Formalin) 50-00-0 1,000Furan 110-00-9 500Hexafluoroacetone 684-16-2 5,000Hydrochloric Acid, Anhydrous 7647-01-0 5,000Hydrofluoric Acid, Anhydrous 7664-39-3 1,000Hydrogen Bromide 10035-10-6 5,000Hydrogen Chloride 7647-01-0 5,000Hydrogen Cyanide, Anhydrous 74-90-8 1,000Hydrogen Fluoride 7664-39-3 1,000Hydrogen Peroxide (52% by weight or greater) 7722-84-1 7,500Hydrogen Selenide 7783-07-5 150Hydrogen Sulfide 7783-06-4 1,500Hydroxylamine 7803-49-8 2,500Iron, Pentacarbonyl 13463-40-6 250 Isopropylamine 75-31-0 5,000Ketene 463-51-4 100Methacrylaldehyde 78-85-3 1,000Methacryloyl Chloride 920-46-7 150Methacryloyloxyethyl Isocyanate 30674-80-7 100Methyl Acrylonitrile 126-98-7 250Methylamine, Anhydrous 74-89-5 1,000Methyl Bromide 74-83-9 2,500Methyl Chloride 74-87-31 5,000Methyl Chloroformate 79-22-1 500Methyl Ethyl Ketone Peroxide (concentration > 60%) 1338-23-4 5,000Methyl Fluoroacetate 453-18-9 100Methyl Fluorosulfate 421-20-5 100Methyl Hydrazine 60-34-4 100Methyl Iodide 74-88-4 7,500Methyl Isocyanate 624-83-9 250Methyl Mercaptan 74-93-1 5,000Methyl Vinyl Ketone 79-84-4 100Methyltrichlorosilane 75-79-6 500Nickel Carbonyl (Nickel Tetracarbonyl) 13463-39-3 150

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Chemical Abstract Service Number

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Threshold Quantity in Pounds (Amount necessary to be covered by this standard.)

CHEMICAL NAME CAS No.

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Total Quantity (lbs.)

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Nitric Acid (94.5% by weight or greater) 7697-37-2 500Nitric Oxide 10102-43-9 250Nitroaniline (para Nitroaniline) 100-01-6 5,000Nitromethane 75-52-5 2,500Nitrogen Dioxide 10102-44-0 250Nitrogen Oxides (NO; NO2; N2O4; N2O3) 10102-44-0 250Nitrogen Tetroxide (also called Nitrogen Peroxide) 10544-72-6 250Nitrogen Trifluoride 7783-54-2 5,000Nitrogen Trioxide 10544-73-7 250Oleum (65% to 80% by weight; also called Fuming Sulfuric Acid) 8014-94-7 1,000Osmium Tetroxide 20816-12-0 100Oxygen Difluoride (Fluorine Monoxide) 7783-41-7 100Ozone 10028-15-6 100Pentaborane 19624-22-7 100Peracetic Acid (concentration > 60% Acetic Acid; also called Per-oxyacetic Acid)

79-21-0 1,000

Perchloric Acid (concentration > 60% by weight) 7601-90-3 5,000Perchloromethyl Mercaptan 594-42-3 150Perchloryl Fluoride 7616-94-6 5,000Peroxyacetic Acid (concentration > 60% Acetic Acid; also called Peracetic Acid)

79-21-0 1,000

Phosgene (also called Carbonyl Chloride) 75-44-5 100Phosphine (Hydrogen Phosphide) 7803-51-2 100Phosphorus Oxychloride (also called Phosphoryl Chloride) 10025-87-3 1,000Phosphorus Trichloride 7719-12-2 1,000Phosphoryl Chloride (also called Phosphorus Oxychloride) 10025-87-3 1,000Propargyl Bromide 106-96-7 100Propyl Nitrate 627-3-4 2,500 Sarin 107-44-8 100Selenium Hexafluoride 7783-79-1 1,000Stibine (Antimony Hydride) 7803-52-3 500 Sulfur Dioxide (liquid) 7446-09-5 1,000Sulfur Pentafluoride 5714-22-7 250Sulfur Tetrafluoride 7783-60-0 250Sulfur Trioxide (also called Sulfuric Anhydride) 7446-11-9 1,000Sulfuric Anhydride (also called Sulfur Trioxide) 7446-11-9 1,000Tellurium Hexafluoride 7783-80-4 250Tetrafluoroethylene 116-14-3 5,000Tetrafluorohydrazine 10036-47-2 5,000Tetramethyl Lead 75-74-1 1,000Thionyl Chloride 7719-09-7 250Trichloro (chloromethyl) Silane 1558-25-4 100Trichloro (dichlorophenyl) Silane 27137-85-5 2,500Trichlorosilane 10025-78-2 5,000Trifluorochloroethylene 79-38-9 10,000Trimethyoxysilane 2487-90-3 1,500

a

Chemical Abstract Service Number

b

Threshold Quantity in Pounds (Amount necessary to be covered by this standard.)

CHEMICAL NAME CAS No.

a

Total Quantity (lbs.)

b

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Table E-1List of Regulated Substances and Thresholds for Accidental Release PreventionRequirements for Petitions under Section 112(r) of the Clean Air Act as Amended

Chemical Name CAS No. Threshold Quantity (lb) Basis for ListingAcetone cyanohydrin 75-86-5 5,000 (b)Acrolein 107-02-8 1,000 (b)Acrylonitrile 107-13-1 10,000 (b)Acrylyl chloride 814-68-6 1,000 (b)Allyl alcohol 107-18-6 5,000 (b)Allylamine 107-11-9 1,000 (b)Ammonia (anhydrous) 7664-41-7 1,000 (a, b)Ammonia (aqueous solution, conc 20% or greater) 7664-41-7 5,000 (a, b)Aniline 62-53-3 5,000 (b)Antimony pentafluoride 7783-70-2 1,000 (b)Arsenous trichloride 7784-34-1 5,000 (b)Arsine 7784-42-1 500 (b)Benzal chloride 98-87-3 1,000 (b)Benzenamine, 3-(trifluoromethyl)- 98-16-8 1,000 (b)Benzotrichloride 98-07-7 500 (b)Benzyl chloride 100-44-7 1,000 (b)Benzyl cyanide 140-29-4 1,000 (b)Boron trichloride 10294-34-5 1,000 (b)Boron trifluoride 7637-07-2 1,000 (b)Boron triflouride compound with methyl ether (1:1) 353-42-4 5,000 (b)Bromine 7726-95-6 1,000 (b)Carbon disulfide 75-15-0 10,000 (b)Chlorine 7782-50-5 1,000 (a, b)Chlorine dioxide 10049-04-4 500 (d)Chloroethanol 107-07-3 1,000 (b)Chloroform 67-66-3 10,000 (b)Chloromethyl ether 542-88-1 500 (b)Chloromethyl methyl ether 107-30-2 1,000 (b)Crotonaldehyde 4170-30-3 10,000 (b)Crotonaldehyde, (E)- 123-73-9 10,000 (b)Cyanogen chloride 506-77-4 1,000 (d)Trans-1,4-dichlorobutene 110-57-6 1,000 (b)Dichloroethyl ether 111-44-4 10,000 (b)Dimethyldichlorosilane 75-78-5 1,000 (b)Dimethylhydrazine 57-14-7 5,000 (b)Dimethyl phosphorochloridothioate 2524-03-0 1,000 (b)Epichlorohydrin 106-89-8 10,000 (b)Ethylenediamine 107-15-3 10,000 (b)Ethyleneimine 151-56-4 1,000 (b)Ethylene oxide 75-21-8 5,000 (a, b)Fluorine 7782-41-4 500 (b)Formaldehyde 50-00-0 500 (b)Formaldehyde cyanohydrin 107-16-4 5,000 (b)Furan 110-00-9 1,000 (b)Hydrazine 302-01-2 5,000 (b)Hydrochloric acid (solution, conc. 25% or greater) 7647-01-0 5,000 (e)Hydrocyanic acid 74-90-8 500 (a, b)Hydrogen chloride (anhydrous) 7647-01-0 1,000 (a, b)Hydrogen fluoride 7664-39-3 500 (a, b)Hydrogen peroxide (conc. > 52%) 7722-84-1 5,000 (b)Hydrogen selenide 7783-07-5 500 (b)Hydrogen sulfide 7783-06-4 1,000 (a, b)

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Iron, pentacarbonyl- 13463-40-6 500 (b)Isobutyronitrile 78-82-0 10,000 (b)Isopropyl chloroformate 108-23-6 5,000 (b)Lactonitrile 78-97-7 5,000 (b)Methacrylonitrile 126-98-7 1,000 (b)Methyl bromide 74-83-9 5,000 (b)Methyl chloride 74-87-3 10,000 (a)Methyl chloroformate 79-22-1 1,000 (b)Methyl hydrazine 60-34-4 5,000 (b)Methyl isocyanate 624-83-9 1,000 (a, b)Methyl mercaptan 74-93-1 1,000 (b)Methyl thiocyanate 556-64-9 10,000 (b)Methyltrichlorosilane 75-79-6 1,000 (b)Nickel carbonyl 13463-39-3 500 (b)Nitric acid 7697-37-2 5,000 (b)Nitric oxide 10102-43-9 1,000 (b)Nitrobenzene 98-95-3 10,000 (c) Parathion 56-38-2 1,000 (c)Peracetic acid 79-21-0 1,000 (b)Perchloromethylmercaptan 594-42-3 1,000 (b)Phenol (liquid) 108-95-2 10,000 (c)Phosgene 75-44-5 500 (a, b)Phosphine 7803-51-2 1,000 (b)Phosphorus oxychloride 10025-87-3 1,000 (b)Phosphorus trichloride 7719-12-2 5,000 (b)Piperidine 110-89-4 5,000 (b)Propionitrile 107-12-0 1,000 (b)Propyl chloroformate 109-61-5 5,000 (b)Propyleneimine 75-55-8 10,000 (b)Propylene oxide 75-56-9 10,000 (b)Pyridine, 2-methyl-5-vinyl- 140-76-1 1,000 (b)Sulfur dioxide 7446-09-5 1,000 (a, b) Sulfuric acid 7664-93-9 5,000 (c)Sulfur tetrafluoride 7783-60-0 1,000 (b)Sulfur trioxide 7446-11-9 1,000 (a, b)Tetramethyllead 75-74-1 1,000 (b)Tetranitromethane 509-14-8 1,000 (b)Thiophenol 108-98-5 1,000 (b)Titanium tetrachloride 7550-45-0 500 (b)Toluene 2,4-diisocyanate 584-84-9 1,000 (a)Toluene 2,6-diisocyanate 91-08-7 1,000 (a)Toluene diisocyanate (unspecified isomer) 26471-62-5 1,000 (a)Trichloroethylsilane 115-21-9 1,000 (b) Trimethylchlorosilane 75-77-4 1,000 (b)Vinyl acetate monomer 108-05-4 5,000 (b)Vinyl chloride 75-01-4 10,000 (a)

Basis for Listing: (a) Mandated for listing by Congress.(b) On EHS list, vapor pressure 0.5 mmHg or greater.(c) On EHS list, vapor pressure less than 0.5 mmHg, but has been involved in accidents resulting in death or injury.(d) Toxic gas.(e) Listed based on toxicity of hydrogen chloride, potential to release hydrogen chloride, and history of accidents.

Table E-1List of Regulated Substances and Thresholds for Accidental Release PreventionRequirements for Petitions under Section 112(r) of the Clean Air Act as Amended (Continued)

E-6 API 581

Table E-2List of Regulated Toxic Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order100 Substances

CAS No. Chemical Name Threshold Quantity (lb) Basis for Listing50-00-0 Formaldehyde 500 (b)56-38-2 Parathion 1,000 (c)57-14-7 Dimethylhydrazine 5,000 (b)60-34-4 Methyl hydrazine 5,000 (b)62-53-3 Aniline 5,000 (b)67-66-3 Chloroform 10,000 (b)74-83-9 Methyl bromide 5,000 (b)74-87-3 Methyl chloride 10,000 (a)74-90-8 Hydrocyanic acid 500 (a, b)74-93-1 Methyl mercaptan 1,000 (b)75-01-4 Vinyl chloride 10,000 (a)75-15-0 Carbon disulfide 10,000 (b)75-21-8 Ethylene oxide 5,000 (a, b)75-44-5 Phosgene 500 (a, b)75-55-8 Propyleneimine 10,000 (b)75-56-9 Propylene oxide 10,000 (b)75-74-1 Tetramethyllead 1,000 (b)75-77-4 Trimethylchlorosi lane 1,000 (b)75-78-5 Dimethyldichlorosi lane 1,000 (b)75-79-6 Methyltrichlorosi lane 1,000 (b)75-86-5 Acetone cyanohydrin 5,000 (b)78-82-0 Isobutyronitrile 10,000 (b)78-97-7 Lactonitrile 5,000 (b)79-21-0 Peracetic acid 1,000 (b)79-22-1 Methyl chloroformate 1,000 (b)91-08-7 Toluene 2,6-diisocyanate 1,000 (a)98-07-7 Benzotrichloride 500 (b)98-16-8 Benzenamine, 3-(trifluoromethyl) 1,000 (b)98-87-3 Benzal chloride 1,000 (b)98-95-3 Nitrobenzene 10,000 (c)100-44-7 Benzyl chloride 1,000 (b)106-89-8 Epichlorohydrin 10,000 (b)107-02-8 Acrolein 1,000 (b)107-07-3 Chloroethanol 1,000 (b)107-11-9 Allylamine 1,000 (b)107-12-0 Propionitrile 1,000 (b)107-16-4 Formaldehyde cyanohydrin 5,000 (b)107-18-6 Allyl alcohol 5,000 (b)107-30-2 Chloromethyl methyl ether 1,000 (b)108-05-4 Vinyl acetate monomer 5,000 (b)108-23-6 Isopropyl chloroformate 5,000 (b)108-91-8 Cyclohexylamine 5,000 (b)108-95-2 Phenol (liquid) 10,000 (c)108-98-5 Thiophenol 1,000 (b)109-61-5 Propyl chloroformate 5,000 (b)110-00-9 Furan 1,000 (b)110-57-6 Trans-1,4-dichlorobutene 1,000 (b)110-89-4 Piperidine 5,000 (b)111-44-4 Dichloroethyl ether 10,000 (b)115-21-9 Trichloroethylsi lane 1,000 (b)123-73-9 Crotonaldehyde, (E) 10,000 (b)126-98-7 Methacrylonitrile 1,000 (b)

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CAS No Chemical Name Threshold Quantity (lbs.) Basis for Listing140-29-4 Benzyl cyanide 1,000 (b)140-76-1 Pyridine, 2-methyl-5-vinyl 1,000 (b)151-56-4 Ethyleneimine 1,000 (b)302-01-2 Hydrazine 5,000 (b)353-42-4 Boron trifluoride compound with methyl ether (1:1) 5,000 (b)506-77-4 Cyanogen chloride 1,000 (d)509-14-8 Tetranitromethane 1,000 (b)542-88-1 Chloromethyl ether 500 (b)556-64-9 Methyl thiocyanate 10,000 (b)584-84-9 Toluene 2,4-diisocyanate 1,000 (a)594-42-3 Perch-loromethylmer-captan 1,000 (b)624-83-9 Methyl isocyanate 1,000 (a, b)814-68-6 Acrylyl chloride 1,000 (b)2524-03-0 Dimethylphosphorochloridothioate 1,000 (b)4170-30-3 Crotonaldehyde 10,000 (b)7446-09-5 Sulfur dioxide 1,000 (a, b)7446-11-9 Sulfur trioxide 1,000 (a, b)7550-45-0 Titanium tetrachloride 500 (b)7637-07-2 Boron trifluoride 1,000 (b)7647-01-0 Hydrogen chloride (anhydrous) 1,000 (a, b)7647-01-0 Hydrochloric acid (solution, conc 25% or greater) 5,000 (e)7664-39-3 Hydrogen fluoride 500 (a, b)7664-41-7 Ammonia (anhydrous) 1,000 (a, b)7664-41-7 Ammonia (aqueous solution, conc. 20% or greater) 5,000 (a, b)7664-93-9 Sulfuric acid 5,000 (c)7697-37-2 Nitric acid 5,000 (b)7719-12-2 Phosphorus trichloride 5,000 (b)7722-84-1 Hydrogen peroxide (conc. > 52%) 5,000 (b)7726-95-6 Bromine 1,000 (a, b)7782-41-4 Fluorine 500 (b)7782-50-5 Chlorine 1,000 (a, b)7783-06-4 Hydrogen sulfide 1,000 (a, b)7783-07-5 Hydrogen selenide 500 (b)7783-60-0 Sulfur tetrafluoride 1,000 (b)7783-70-2 Antimony pentafluoride 1,000 (b)7784-34-1 Arsenous trichloride 5,000 (b)7784-42-1 Arsine 500 (b)7803-51-2 Phosphine 1,000 (b)10025-87-3 Phosphorus oxychloride 1,000 (b)10049-04-4 Chlorine dioxide 500 (d)10102-43-9 Nitric oxide 1,000 (b)10294-34-5 Boron trichloride 1,000 (b)13463-39-3 Nickel carbonyl 500 (b)13463-40-6 Iron, pentacarbonyl 500 (b)19287-45-7 Diborane 500 (b)26471-62-5 Toluene diisocyanate (unspecified isomer) 1,000 (a)

Basis for Listing: (a) Mandated for listing by Congress.(b) On EHS list, vapor pressure 0.5 mmHg or greater.(c) On EHS list, vapor pressure less than 0.5 mmHg, but has been involved in accidents resulting in death or injury. (d) Toxic gas.(e) Listed based on toxicity of hydrogen chloride, potential to release hydrogen chloride, and history of accidents.

Table E-2List of Regulated Toxic Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order100 Substances (Continued)

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Table E-3List of Regulated Flammable Substances and Threshold Quantities forAccidental Release Prevention

Chemical Name CAS No. Threshold Quantity (lb) Basis for ListingAcetaldehyde 75-07-0 10,000 (g)Acetylene 74-86-2 10,000 (f)Bromotrifluorethylene 598-73-2 10,000 (f)1,3-Butadiene 106-99-0 10,000 (f)Butane 106-97-8 10,000 (f)1-Butene 106-98-9 10,000 (f)2-Butene 107-01-7 10,000 (f)Butene 25167-67-3 10,000 (f)2-Butene-cis 590-18-1 10,000 (f)2-Butene-trans 624-64-6 10,000 (f)Carbon oxysulfide 463-58-1 10,000 (f)Chlorine monoxide 7791-21-1 10,000 (f)2-Chloropropylene 557-98-2 10,000 (g)1-Chloropropylene 590-21-6 10,000 (g)Cyanogen 460-19-5 10,000 (f)Cyclopropane 75-19-4 10,000 (f)Dichlorosilane 4109-96-0 10,000 (f)Difluoroethane 75-37-6 10,000 (f)Dimethylamine 124-40-3 10,000 (f)2,2-Dimethylpropane 463-82-1 10,000 (f)Ethane 74-84-0 10,000 (f)Ethyl acetylene 107-00-6 10,000 (f)Ethylamine 75-04-7 10,000 (f)Ethyl chloride 75-00-3 10,000 (f)Ethylene 74-85-1 10,000 (f)Ethyl ether 60-29-7 10,000 (g)Ethyl mercaptan 75-08-1 10,000 (g)Ethyl nitrite 109-95-5 10,000 (f)Hydrogen 1333-74-0 10,000 (f)Isobutane 75-28-5 10,000 (f)Isopentane 78-78-4 10,000 (g)Isoprene 78-79-5 10,000 (g)Isopropylamine 75-31-0 10,000 (g)Isopropyl chloride 75-29-6 10,000 (g)Methane 74-82-8 10,000 (f)Methylamine 74-89-5 10,000 (f)Methyl ether 115-10-6 10,000 (f)Methyl formate 107-31-3 10,000 (g)2-Methylpropene 115-11-7 10,000 (f)

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1,3-Pentadiene 504-60-9 10,000 (f)Pentane 109-66-0 10,000 (g)1-Pentene 109-67-1 10,000 (g)2-Pentene, (E)- 646-04-8 10,000 (g)2-Pentene, (Z)- 627-20-3 10,000 (g)Propadiene 463-49-0 10,000 (f)Propane 74-98-6 10,000 (f)Propylene 115-07-1 10,000 (f)Propyne 74-99-7 10,000 (f)Silane 7803-62-5 10,000 (f)Tetrafluoroethylene 116-14-3 10,000 (f)Tetramethylsilane 75-76-3 10,000 (g)Trichlorosilane 10025-78-2 10,000 (g)Trifluoro-chloroethylene 79-38-9 10,000 (f)Trimethylamine 75-50-3 10,000 (f)Vinyl acetylene 689-97-4 10,000 (f)Vinyl ethyl ether 109-92-2 10,000 (g)Vinyl fluoride 75-02-5 10,000 (f)Vinylidene chloride 75-35-4 10,000 (g)Vinylidene fluoride 75-38-7 10,000 (f)Vinyl methyl ether 107-25-5 10,000 (f)

Basis for Listing: (f) Flammable gas.(g) Volatile flammable liquid.

Table E-3List of Regulated Flammable Substances and Threshold Quantities forAccidental Release Prevention (Continued)

Chemical Name CAS No. Threshold Quantity (lb) Basis for Listing

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Table E-4List of Regulated Flammable Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order62 Substances

CAS No. Chemical Name Threshold Quantity (lb) Basis for Listing60-29-7 Ethyl ether 10,000 (g)74-82-8 Methane 10,000 (f)74-84-0 Ethane 10,000 (f)74-85-1 Ethylene 10,000 (f)74-86-2 Acetylene 10,000 (f)74-89-5 Methylamine 10,000 (f)74-98-6 Propane 10,000 (f)74-99-7 Propyne 10,000 (f)75-00-3 Ethyl chloride 10,000 (f)75-02-5 Vinyl fluoride 10,000 (f)75-04-7 Ethylamine 10,000 (f)75-07-0 Acetaldehyde 10,000 (g)75-08-1 Ethyl mercaptan 10,000 (g)75-19-4 Cyclopropane 10,000 (f)75-28-5 Isobutane 10,000 (f)75-29-6 Isopropyl chloride 10,000 (g)75-31-0 Isopropylamine 10,000 (g)75-35-4 Vinylidene chloride 10,000 (g)75-37-6 Difluoroethane 10,000 (f)75-38-7 Vinylidene fluoride 10,000 (f)75-50-3 Trimethylamine 10,000 (f)75-76-3 Tetramethylsilane 10,000 (g)78-78-4 Isopentane 10,000 (g)78-79-5 Isoprene 10,000 (g)79-38-9 Trifluorochloroethylene 10,000 (f)106-97-8 Butane 10,000 (f)106-98-9 1-Butene 10,000 (f)106-99-0 1,3-Butadiene 10,000 (f)107-00-6 Ethyl acetylene 10,000 (f)107-01-7 2-Butene 10,000 (f)107-25-5 Vinyl methyl ether 10,000 (f)107-31-3 Methyl formate 10,000 (g)109-66-0 Pentane 10,000 (g)109-67-1 1-Pentene 10,000 (g)109-92-2 Vinyl ethyl ether 10,000 (g)109-95-5 Ethyl nitrite 10,000 (f)115-11-7 2-Methylpropene 10,000 (f)116-14-3 Tetrafluoroethylene 10,000 (f)124-40-3 Dimethylamine 10,000 (f)

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460-19-5 Cyanogen 10,000 (f)463-49-0 Propadiene 10,000 (f)463-58-1 Carbon oxysulfide 10,000 (f)463-82-1 2,2-Dimethylpropane 10,000 (f)504-60-9 1,3-Pentadiene 10,000 (f)557-98-2 2-Chloropropylene 10,000 (g)563-45-1 3-Methyl-1-butene 10,000 (f)563-46-2 2-Methyl-1-butene 10,000 (g)590-18-1 2-Butene-cis 10,000 (f)590-21-6 1-Chloropropylene 10,000 (g)598-73-2 Bromotrifluorethylene 10,000 (f)624-64-6 2-Butene-trans 10,000 (f)627-20-3 2-Pentene, (Z) 10,000 (g)646-04-8 2-Pentene, (E) 10,000 (g)689-97-4 Vinyl acetylene 10,000 (f)1333-74-0 Hydrogen 10,000 (f)4109-96-0 Dichlorosilane 10,000 (f)7791-21-1 Chlorine monoxide 10,000 (f)7803-62-5 Silane 10,000 (f)10025-78-2 Trichlorosilane 10,000 (g)25167-67-3 Butene 10,000 (f)

Basis for Listing: (f) Flammable gas.(g) Volatile flammable liquid.

Table E-4List of Regulated Flammable Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order62 Substances (Continued)

CAS No. Chemical Name Threshold Quantity (lb) Basis for Listing

TABLE OF CONTENTSAPPENDIX EOSHA 1910 AND EPA HAZARDOUS CHEMICALS LISTTablesTable E-1List of Regulated Substances and Thresholds for Accidental Release PreventionRequirements for Petitions under SectTable E-2List of Regulated Toxic Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order100 Table E-3List of Regulated Flammable Substances and Threshold Quantities for Accidental Release PreventionTable E-4List of Regulated Flammable Substances and Threshold Quantities for Accidental Release PreventionCAS Number Order