Appendix D. Comparison of OSHA and EPA Lists of Highly Hazardous Chemicals and Regulated Substances Acetaldehyde. Acrolein [2-Propenal]

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1 Appendix D Comparison of OSHA and EPA Lists of Highly Hazardous Chemicals and egulated Substances Acetaldehyde Acrolein [2-Propenal], Acrylonitrile [ 2 -Propenenitrile ] Acrylyl chloride [2-Propenoyl chloride] Various Alkylaluminums Allyl alcohol [2-Propen-l-ol] Allyl chloride Allylamine [2-Propen-l-amine] Ammonia [anhydrous]

2 Ammonia solutions (44% ammonia or greater by wt) Ammonia solutions (20% or greater by wt) Ammonium perchlorate Ammonium permanganate Arsenous trichloride Ar sine [Arsenic hydride] Boron trichloride [Borane, trichloro-] Boron trifluoride [Borane, trifluoro Boron trifluoride with Methyl ether (1:1) [Boron, trifluoro [oxybis[metane]]-, -4- Bromine Bromine chloride Bromine pentafluoride Bromine trifluoride Bromopropyne, 3 - [Propargyl bromide] Butyl hydroperoxide (tertiary) Butyl perbenzoate (tertiary) Carbon disulfide Carbonyl fluoride

3 Cellulose nitrate (cone. > 12.6% nitrogen) Chlorine Chlorine dioxide [Chlorine oxide (ClO 2 )] (c) Chlorine pentafluoride Chlorine trifluoride, Chloroform [Methane, trichloro-] Chloromethyl ether [Methane, oxybis[chloro-]] Chloromethyl methyl ether [Methane, chloromethoxy- ] Chloropicrin, NONE Chloropicrin and methyl bromide mixture, NONE Chloropicrin and methyl chloride mixture, Crotonaldehyde [2-Butenal] Crotonaldehyde, (E)- [2-butenal, (E)-] Cumene hydroperoxide Cyanogen Cyanogen chloride Cyanuric fluoride

4 Cyclohexylamine [ Cyclohexanamine ] Diacetyl peroxide (cone. > 70%) Diazomethane Dibenzoyl peroxide Diborane Dibutyl peroxide (tertiary) Dichloroacetylene Dichlorosilane, Diethyl zinc Diethylaluminum chloride [ chlorodiethylaluminum ] Diisopropyl peroxydicarbonate Dilauroyl peroxide Dimethylamine [anhydrous] Dimethyldichlorosilane [Silane, dichlorodimethy 1- ] Dimethylhydrazine, I 7 I- [Hydrazine, 1,1 -dimethyl-] Dinitr oaniline, 2, Dinitrochlorobenzene [ 1 -chloro-2,4-dinitroben zene]

5 Epichlorohydrin [Oxirane, (chloromethyl)-] Ethyl nitrite, Ethylamine Ethylene fluorohydrin Ethylene oxide [Oxirane], fob) Ethylenediamine [ 1,2-Ethanediamine] Ethyleneimine [Aziridine], Fluorine, Formaldehyde (solution, concentration not specified) Formaldehyde [Formalin] (37% or greater by wt, per 7/28/92 OSHA interpretation letter) Furan Hexafluoroacetone Hydrazine Hydrochloric acid (37% or greater by wt) (7) (d) Hydrocyanic acid [Hydrogen cyanide (anhydrous)] fob)

6 Hydrogen bromide (anhydrous) Hydrogen chloride [Hydrochloric acid, anhydrous] Hydrogen fluoride/ Hydrofluoric acid (50% or greater by weight) Hydrogen fluoride [Hydrofluoric acid (anhydrous)] Hydrogen peroxide (52% or greater by wt) Hydrogen selenide Hydrogen sulfide Hydroxylamine Iron, pentacarbonyl- [[Iron carbonyl (Fe(CO) 5 UB-S-Il)-] Isobutyronitrile [Propanenitrile, 2-methyl-] Isopropyl chloroformate [Carbonochloridic acid, methylethyl ester] Isopropylamine (a) Ketene Methacrylaldehyde Methacrylonitrile [ 2 -Propenenitrile, 2-methyl-]

7 Methacryloyl chloride Methacryloyloxyethyl isocyanate Methyl bromide Methyl chloride [methane, chloro-] Methyl chloroformate [Carbonochloridic acid, methyl ester] Methyl ethyl ketone peroxide (60% or greater by wt) Methyl fluoroacetate Methyl fluorosulfate Methyl hydrazine [Hydrazine, methyl-] Methyl iodide Methyl isocyanate [Methane, -isocyanato-] Methyl mercaptan [Methanethiol] Methyl thiocyanate [hyocyanic acid, methyl ester] Methyl vinyl ketone Methylamine (anhydrous) (a) Methyltrichlorosilane [Silane, trichloromethyl- ] Nickel carbonyl [Nickel tetracarbonyl]

8 Nitric acid (80 % or greater by wt) Nitric acid (94.5 % or greater by wt) Nitric oxide [Nitrogen oxide (NO)] Nitroaniline ( Paranitroaniline) Nitrogen oxides(no 2/ N 2 0 4/ N 2 O 3 ) Nitrogen tetroxide (Nitrogen peroxide) Nitrogen trifluoride Nitrogen trioxide Nitromethane Oleum (65% SO 3 or greater by wt, per 6/24/93OSHA interpretation letter) Oleum (Fuming sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] Osmium tetroxide Oxygen difluoride [Fluorine monoxide] Ozone Pentaborane Per acetic acid (60% or greater by wt) [ Per oxy acetic acid],

9 Peracetic acid (concentration not specified) [Ethaneperoxoic acid] Perchloric acid (60% or greater by wt) Perchloromethylmercap tan [Methanesulfenyl chloride, thrichloro-] Perchloryl fluoride Phosgene [carbonic dichloride, carbonyl chloride] Phosphine [Hydrogen phosphide] Phosphorus oxychloride [Phosphoryl chloride] Phosphorus trichloride Piperidine Propionitrile (propanenitrile] Propyl chloroformate [Carbonochloridic acid, propylester] Propyl nitrate Propylene oxide [Oxirane, methyl-] Propyleneimine [Aziridine, 2-methyl-] Sarin Selenium hexafluoride Stibine [Antimony hydride]

10 Sulfur dioxide (anhydrous) Sulfur pentafluoride Sulfur tetrafluoride [Sulfur fluoride (SF 4 ), (-4)-l Sulfur trioxide [SuIf uric anhydride] ellurium hexafluoride etrafluoroethylene etrafluorohydrazine etramethyl lead [Plumbane, tetramethyl etranitromethane [Methane, tetranitro-] hionyl chloride itanium tetrachloride [itanium chloride (icl 4 ) (-4)-] oluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato- 1 -methyl- ] (a)< 5) oluene 2,6-diisocyanate [benzene, 1,3-diisocyanato-2 -methyl- ] (a)< 5) oluene diisocyanate (unspecified isomer) [Benzene, 1, 3 -diisocy anatomethy 1- ] (a)< 5) richloro(chloro methyl) silane

11 richloro(dichlorophenyl)silane richlorosilane rifluorochloroethylene rimethylchlorosilane [Silane, chlorotrimethyl-] rimethyoxysilane Vinyl acetate monomer [Acetic acid ethenyl ester] Acetaldehyde Acetylene [Ethyne] Bromotrifluorethylene [Ethene, bromotrifluoro-] Butadiene, 1,3- Butane Butene Butene, 1- Butene, 2- Butene-ds, 2- Butene-trans, 2- [2-Butene, (E)]

12 Carbon oxysulfide [Carbon oxide sulfide (COS)] _ _ Chlorine monoxide [Chlorine oxide] Chloropropylene, 1- [1-propene, 1-chloro-] Chloropropylene, 2- [1-propene, 2-chloro-] Cyanogen [ Ethanedinitrile ] Cyclopropane Dichlorosilane [Silane, dichloro-] Difluoroethane [Ethane, 1,1-difluoro-] Dimethylamine [Methanamine, n-methyl-] Dimethy!propane, 2,2- [Propane, 2, 2 -dimethyl-] Ethane Ethyl acetylene [1-Butyne] Ethyl chloride [Ethane, chloro-] Ethyl ether [ethane, l,l'-oxybis-] Ethyl mercaptan [Ethanethiol] Ethyl nitrite [Nitrous acid, ethylester] Ethylamine [Ethanamine] Ethylene [Ethene] Hydrogen Isobutane [Propane, 2-methyl] Isopentane [Butane, 2-methyl-]

13 Isoprene [1,3 -Butadiene, 2-methyl-] Isopropyl chloride [ Propane, 2 -chlor o- ] Isopropylamine [ 2 -Propanamine ] Methane Methyl- 1-butene, 3- Methyl-1-butene, 2- Methyl ether [methane, oxybis-] Methyl formate [Formic acid, methyl ester] Methylamine [Methanamine] Methylpropene, 2- [1-Propene, 2-methyl- ] Pentadiene 1,3- Pentane Pentene (E)-, 2- Pentene, (Z)-, 2- Pentene, 1- Propadiene [ 1, 2-Propadiene] Propane Propylene [1-Propene] Propyne [1-Propyne] Silane etrafluoroethylene [Ethene, tetrafluoro-] etramethylsilane [Silane, tetramethyl-]

14 richlorosilane [Silane, trichloro-] rifluorochloroethylene [Ethene, chlorotrifluoro-] rimethylamine [Methanamine, N,N-dimethyl-] Vinyl acetylene [l-buten-3-yne] Vinyl chloride [Ethene, chloro-] Vinyl ethyl ether [Ethene, ethoxy-] Vinyl fluoride [Ethene, fluoro-] Vinyl methyl ether [Ethene, methoxy-j (a,f) Vinylidene chloride [Ethene, 1,1-dichloro-] Vinylidene fluoride [Ethene, 1,1-difluoro-] Notes: EPA regulated toxic substances while OSHA regulated both toxic and reactive substances (those having an NFPA 49 reactivity ratings of 3 or 4). While OSHA did not delineate which substances were regulated for which property (toxicity or reactivity), reasonable inference can be made from parallels between the OSHA list and the list of substances regulated under Delaware's Extremely Hazardous Substances isk Management regulations. his has been indicated above with a "" for toxic and an "" for reactive in the OSHA Listing Basis column. he specific bases for listing of EPA substances are indicated via the following footnotes: (a) Mandated for listing by Congress. On EHS list, vapor pressure 10 mm Hg or greater. (c) oxic gas.

15 Notes (continued) (d) oxicity of hydrogen chloride, potential to release hydrogen chloride, and history of accidents. (e) oxicity of sulfur trioxide, potential to release sulfur trioxide, and history of accidents. Flammable gas. Volatile flammable liquid. Other footnotes: (1) OSHA generally covers only commercial strengths of chemicals; dilutions of these chemicals (except for those specifically listed as solutions) are not covered. Where the listed HHC is a solution (at or above a specified minimum concentration), the total weight of the solution is the quantity that is compared to the d. (2) EPA d 7 S for toxics are, with the exception of oleum, intended to be applied to the mass of the regulated chemical at whatever concentration it exists in the process; for example, if the dis 10,000 lbs, it pertains to 10,000 lbs of the molecules of the regulated chemical. However, see the exclusion for solutions at concentrations of < 1 wt% or with partial pressure < 10 mm Hg, per (l). he single exception to the above "rule" is oleum; since there is no "oleum molecule" the dof 10,000 lbs applies to the total amount of solution, regardless of concentration. (3) EPA has established separate ds for anhydrous ammonia and for ammonia in solutions; and for anhydrous hydrogen chloride and hydrochloric acid solutions. In each case, the dpertains to the pounds of regulated substance, not the pounds of solution. Note that the solutions are not regulated unless the concentration is equal to or greater than 20 weight percent for ammonia or 37 weight percent for hydrochloric acid. (4) Methyl chloride is the only substance for which the EPA threshold quantity is smaller than the OSHA threshold quantity. (5) he mixture exemption in (l) does not apply to this substance (6) hese substances, while not specifically listed by OSHA, would be covered by OSHA as flammables. (7) EPA increased the solution concentration cut-off from 30 to 37% in a Final ule issued 8/25/97. (8) See (2), as revised by the 1/6/98 Final ule, for EPA's handling of ds for flammable mixtures.