Regulated Substances

Toxic Chemicals Regulated under RMP that are also Regulated under PSM
[Alphabetical Order - 78 Substances]
Chemical Name CAS No. RMP Threshold Quantity (lbs.) PSM Threshold Quantity (lbs.)
Acrolein [2-Propenal] 107-02-8 5,000 150
Acrylonitrile [2-Propenenitrile] 107-13-1 20,000 Not Regulated
Acrylyl chloride [2-Propenoyl chloride] 814-68-6 5,000 250
Allyl alcohol [2-Propen-1-ol] 107-18-6 15,000 Not Regulated
Allylamine [2-Propen-1-amine] 107-11-9 10,000 1000
Ammonia (anhydrous) 7664-41-7 10,000 10000
Ammonia (solution) 7664-41-7 20,000(conc. 20% or greater) 15000(conc. 44% or greater)
Arsenous trichloride 7784-34-1 15,000 Not Regulated
Arsine 7784-42-1 1,000 100
Boron trichloride [Borane, trichloro-] 10294-34-5 5,000 2500
Boron trifluoride [Borane, trifluoro-] 7637-07-2 5,000 250
Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro[oxybis[metane]]-, T-4- 353-42-4 15,000 Not Regulated
Bromine 7726-95-6 10,000 1500
Carbon disulfide 75-15-0 20,000 Not Regulated
Chlorine 7782-50-5 2,500 1500
Chlorine dioxide [Chlorine oxide (ClO2)] 10049-04-4 1,000 1000
Chloroform [Methane, trichloro-] 67-66-3 20,000 Not Regulated
Chloromethyl ether [Methane, oxybis[chloro-] 542-88-1 1,000 Not Regulated
Chloromethyl methyl ether [Methane, chloromethoxy-] 107-30-2 5,000 500
Crotonaldehyde [2-Butenal] 4170-30-3 20,000 Not Regulated
Crotonaldehyde, (E)- [2-Butenal, (E)-] 123-73-9 20,000 Not Regulated
Cyanogen chloride 506-77-4 10,000 500
Cyclohexylamine [Cyclohexanamine] 108-91-8 15,000 Not Regulated
Diborane 19287-45-7 2,500 100
Dimethyldichlorosilane [Silane, dichlorodimethyl-] 75-78-5 5,000 1000
1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-] 57-14-7 15,000 1000
Epichlorohydrin [Oxirane, (chloromethyl)-] 106-89-8 20,000 Not Regulated
Ethylenediamine [1,2-Ethanediamine] 107-15-3 20,000 Not Regulated
Ethyleneimine [Aziridine] 151-56-4 10,000 1000
Ethylene oxide [Oxirane] 75-21-8 10,000 5000
Fluorine 7782-41-4 1,000 1000
Formaldehyde (solution) 50-00-0 15,000 1000
Furan 110-00-9 5,000 500
Hydrazine 302-01-2 15,000 Not Regulated
Hydrochloric acid 7647-01-0 15,000(conc 37% or greater) 5000 (anhydrous only)
Hydrocyanic acid 74-90-8 2,500 1000
Hydrogen chloride (anhydrous) [Hydrochloric acid] 7647-01-0 5,000 5,000
Hydrogen fluoride/Hydrofluoric acid [Hydrofluoric acid] 7664-39-3 1000 (conc. 50% or greater) 1000 (anhydrous only)
Hydrogen selenide 7783-07-5 500 150
Hydrogen sulfide 7783-06-4 10,000 1500
Iron, pentacarbonyl- [Iron carbonyl (Fe(CO) 5), (TB-5-11)-] 13463-40-6 2,500 Not Regulated
Isobutyronitrile [Propanenitrile, 2-methyl-] 78-82-0 20,000 250
Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester] 108-23-6 15,000 Not Regulated
Methacrylonitrile [2-Propenenitrile, 2-methyl-] 126-98-7 10,000 250
Methyl chloride [Methane, chloro-] 74-87-3 10,000 15000
Methyl chloroformate [Carbonochloridic acid, methylester] 79-22-1 5,000 500
Methyl hydrazine [Hydrazine, methyl-] 60-34-4 15,000 100
Methyl isocyanate [Methane, isocyanato-] 624-83-9 10,000 250
Methyl mercaptan [Methanethiol] 74-93-1 10,000 5000
Methyl thiocyanate [Thiocyanic acid, methyl ester] 556-64-9 20,000 Not Regulated
Methyltrichlorosilane [Silane, trichloromethyl-] 75-79-6 5,000 500
Nickel carbonyl 13463-39-3 1,000 150
Nitric acid (conc 80% or greater) 7697-37-2 15,000 500
Nitric oxide [Nitrogen oxide (NO)] 10102-43-9 10,000 250
Nitrogen tetroxide 2 10544-72-6 250 250
Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] 1 8014-95-7 10,000 1000
Peracetic acid [Ethaneperoxoic acid] 79-21-0 10,000 1000
Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] 594-42-3 10,000 150
Phosgene [Carbonic dichloride] 75-44-5 500 100
Phosphine 7803-51-2 5,000 100
Phosphorus oxychloride [Phosphoryl chloride] 10025-87-3 5,000 1000
Phosphorus trichloride [Phosphorous trichloride] 7719-12-2 15,000 1000
Piperidine 110-89-4 15,000 Not Regulated
Propionitrile [Propanenitrile] 107-12-0 10,000 Not Regulated
Propyl chloroformate [Carbonochloridic acid, propylester] 109-61-5 15,000 Not Regulated
Propyleneimine [Aziridine, 2-methyl-] 75-55-8 10,000 Not Regulated
Propylene oxide [Oxirane, methyl-] 75-56-9 10,000 Not Regulated
Sulfur dioxide (anhydrous) 7446-09-5 5,000 1000
Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] 7783-60-0 2,500 250
Sulfur trioxide 7446-11-9 10,000 1000
Tetramethyllead [Plumbane, tetramethyl-] 75-74-1 10,000 1000
Tetranitromethane [Methane, tetranitro-] 509-14-8 10,000 Not Regulated
Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-] 7550-45-0 2,500 Not Regulated
Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1-methyl-] 1 584-84-9 10,000 Not Regulated
Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-] 1 91-08-7 10,000 Not Regulated
Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] 1 26471-62-5 10,000 Not Regulated
Trimethylchlorosilane [Silane, chlorotrimethyl-] 75-77-4 10,000 Not Regulated
Vinyl acetate monomer [Acetic acid ethenyl ester] 108-05-4 15,000 Not Regulated
1 The mixture exemption in 68.115(b)(1) does not apply to the substance.

2 Only applies to Louisiana Chemical Accident Prevention Program. Not regulated under 40 CFR part 68.






List of Regulated Flammable Substances and
Threshold Quantities for Accidental Release Prevention
[Alphabetical Order - 63 Substances]
Chemical Name CAS No. RMP Threshold Quantity (lbs) PSM
Threshold
Quantity
(lbs)
Acetaldehyde 75-07-0 10,000 2,500
Acetylene [Ethyne] 74-86-2 10,000 10,000*
Bromotrifluorethylene [Ethene, bromotrifluoro-] 598-73-2 10,000 10,000*
1,3-Butadiene 106-99-0 10,000 10,000*
Butane 106-97-8 10,000 10,000*
1-Butene 106-98-9 10,000 10,000*
2-Butene 107-01-7 10,000 10,000*
Butene 25167-67-3 10,000 10,000*
2-Butene-cis 590-18-1 10,000 10,000*
2-Butene-trans [2-Butene, (E)] 624-64-6 10,000 10,000*
Carbon oxysulfide [Carbon oxide sulfide (COS)] 463-58-1 10,000 10,000*
Chlorine monoxide [Chlorine oxide] 7791-21-1 10,000 Not Regulated
2-Chloropropylene [1-Propene, 2-chloro-] 557-98-2 10,000 10,000*
1-Chloropropylene [1-Propene, 1-chloro-] 590-21-6 10,000 10,000*
Cyanogen [Ethanedinitrile] 460-19-5 10,000 2,500
Cyclopropane 75-19-4 10,000 10,000*
Dichlorosilane [Silane, dichloro-] 4109-96-0 10,000 2,500
Difluoroethane [Ethane, 1,1-difluoro-] 75-37-6 10,000 NA
Dimethylamine [Methanamine, N-methyl-] 124-40-3 10,000 2,500
2,2-Dimethylpropane [Propane, 2,2-dimethyl-] 463-82-1 10,000 10,000*
Ethane 74-84-0 10,000 10,000*
Ethyl acetylene [1-Butyne] 107-00-6 10,000 10,000*
Ethylamine [Ethanamine] 75-04-7 10,000 7,500
Ethyl chloride [Ethane, chloro-] 75-00-3 10,000 10,000*
Ethylene [Ethene] 74-85-1 10,000 10,000*
Ethyl ether [Ethane, 1,1'-oxybis-] 60-29-7 10,000 10,000*
Ethyl mercaptan [Ethanethiol] 75-08-1 10,000 10,000*
Ethyl nitrite [Nitrous acid, ethyl ester] 109-95-5 10,000 5,000
Hydrogen 1333-74-0 10,000 10,000*
Isobutane [Propane, 2-methyl] 75-28-5 10,000 10,000*
Isopentane [Butane, 2-methyl-] 78-78-4 10,000 10,000*
Isoprene [1,3-Butadiene, 2-methyl-] 78-79-5 10,000 10,000*
Isopropylamine [2-Propanamine] 75-31-0 10,000 5,000
Isopropyl chloride [Propane, 2-chloro-] 75-29-6 10,000 10,000*
Methane 74-82-8 10,000 10,000*
Methylamine [Methanamine] 74-89-5 10,000 1,000
3-Methyl-1-butene 563-45-1 10,000 10,000*
2-Methyl-1-butene 563-46-2 10,000 10,000*
Methyl ether [Methane, oxybis-] 115-10-6 10,000 10,000*
Methyl formate [Formic acid, methyl ester] 107-31-3 10,000 10,000*
2-Methylpropene [1-Propene, 2-methyl-] 115-11-7 10,000 10,000*
1,3-Pentadiene 504-60-9 10,000 10,000*
Pentane 109-66-0 10,000 10,000*
1-Pentene 109-67-1 10,000 10,000*
2-Pentene, (E)- 646-04-8 10,000 10,000*
2-Pentene, (Z)- 627-20-3 10,000 10,000*
Propadiene [1,2-Propadiene] 463-49-0 10,000 NA
Propane 74-98-6 10,000 10,000*
Propylene [1-Propene] 115-07-1 10,000 10,000*
Propyne [1-Propyne] 74-99-7 10,000 10,000*
Silane 7803-62-5 10,000 10,000*
Tetrafluoroethylene [Ethene, tetrafluoro-] 116-14-3 10,000 5,000
Tetramethylsilane [Silane, tetramethyl-] 75-76-3 10,000 10,000*
Trichlorosilane [Silane, trichloro-] 10025-78-2 10,000 5,000
Trifluorochloroethylene [Ethene, chlorotrifluoro-] 79-38-9 10,000 10,000
Trimethylamine [Methanamine, N,N-dimethyl-] 75-50-3 10,000 10,000*
Vinyl acetylene [1-Buten-3-yne] 689-97-4 10,000 10,000*
Vinyl chloride [Ethene, chloro-] 75-01-4 10,000 10,000*
Vinyl ethyl ether [Ethene, ethoxy-] 109-92-2 10,000 10,000*
Vinyl fluoride [Ethene, fluoro-] 75-02-5 10,000 10,000*
Vinylidene chloride [Ethene, 1,1-dichloro-] 75-35-4 10,000 10,000*
Vinylidene fluoride [Ethene, 1,1-difluoro-] 75-38-7 10,000 10,000*
Vinyl methyl ether [Ethene, methoxy-] 107-25-5 10,000 10,000*

* Flammable chemicals with an asterisk are not specifically listed in 1910.119 appendix A, but do meet the criteria in 1910.1200 (c) to be regulated under 1910.119 as a flammable chemical with a threshold quantity of 10,000 lbs. Those criteria state that a flammable gas must have a Lower Explosive (flammability) Limit (LEL)of 13% or less at ambient temperature and pressure and a flammable liquid must have a flashpoint less than 100 degrees F to covered by 1910.119. If you have one of these flammable chemicals with an asterisk by it that does not meet these specifications to be regulated under the OSHA PSM standard, then DEQ may request that you provide a valid Material Safety Data Sheet for that chemical listing the LEL or Flashpoint. The National Fire Protection Association Guide to Hazardous Materials, Code 325, sections 1-3.3 and 1-3.5 lists the definitions for Flashpoint and LEL.

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