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 Code of Federal Regulations (Last Updated: May 6, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter C - Air Programs
 Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories
 Subpart GGGGG - National Emission Standards for Hazardous Air Pollutants: Site Remediation

  Table 1 to Subpart GGGGG of Part 63 - List of Hazardous Air Pollutants  

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  • Table 1 to Subpart GGGGG of Part 63 - List of Hazardous Air Pollutants

    CAS No.a Compound name Fm 305
    75070 Acetaldehyde 1.000
    75058 Acetonitrile 0.989
    98862 Acetophenone 0.314
    98862 Acetophenone 0.314
    107028 Acrolein 1.000
    107131 Acrylonitrile 0.999
    107051 Allyl chloride 1.000
    71432 Benzene (includes benzene in gasoline) 1.000
    98077 Benzotrichloride (isomers and mixture) 0.958
    100447 Benzyl chloride 1.000
    92524 Biphenyl 0.864
    542881 Bis(chloromethyl)etherb 0.999
    75252 Bromoform 0.998
    106990 1,3-Butadiene 1.000
    75150 Carbon disulfide 1.000
    56235 Carbon Tetrachloride 1.000
    43581 Carbonyl sulfide 1.000
    133904 Chloramben 0.633
    108907 Chlorobenzene 1.000
    67663 Chloroform 1.000
    107302 Chloromethyl methyl etherb 1.000
    126998 Chloroprene 1.000
    98828 Cumene 1.000
    94757 2,4-D, salts and esters 0.167
    334883 Diazomethanec 0.999
    132649 Dibenzofurans 0.967
    96128 B1,2-Dibromo-3-chloropropane 1.000
    106467 1,4-Dichlorobenzene(p) 1.000
    107062 Dichloroethane (Ethylene dichloride) 1.000
    111444 Dichloroethyl ether (Bis(2-chloroethylether) 0.757
    542756 1,3-Dichloropropene 1.000
    64675 Diethyl sulfate 0.0025
    79447 Dimethyl carbamoyl chloridec 0.150
    77781 Dimethyl sulfate 0.086
    121697 N,N-Dimethylaniline 0.0008
    51285 2,4-Dinitrophenol 0.0077
    121142 2,4-Dinitrotoluene 0.0848
    123911 1,4-Dioxane (1,4-Diethyleneoxide) 0.869
    106898 Epichlorohydrin (1-Chloro-2,3-epoxypropane) 0.939
    106887 1,2-Epoxybutane 1.000
    140885 Ethyl acrylate 1.000
    100414 Ethyl benzene 1.000
    75003 Ethyl chloride (Chloroethane) 1.000
    106934 Ethylene dibromide (Dibromoethane) 0.999
    107062 Ethylene dichloride (1,2-Dichloroethane) 1.000
    151564 Ethylene imine (Aziridine) 0.867
    75218 Ethylene oxide 1.000
    75343 Ethylidene dichloride (1,1-Dichloroethane)
    Glycol ethersd that have a Henry's Law Constant value equal to or greater than 0.01 Y/X(1.8 × 10−6 atm/gm-mole/m3) at 25 °C    		 1.000
    [e]
    118741 Hexachlorobenzene 0.97
    87683 Hexachlorobutadiene 0.88
    67721 Hexachloroethane 0.499
    110543 Hexane 1.000
    78591 Isophorone 0.506
    58899 Lindane (all isomers) 1.000
    67561 Methanol 0.855
    74839 Methyl bromide (Bromomethane) 1.000
    74873 Methyl chloride (Choromethane) 1.000
    71556 Methyl chloroform (1,1,1-Trichloroethane) 1.000
    74884 Methyl iodide (Iodomethane) 1.000
    108101 Methyl isobutyl ketone (Hexone) 0.979
    624839 Methyl isocyanate 1.000
    80626 Methyl methacrylate 0.999
    1634044 Methyl tert butyl ether 1.000
    75092 Methylene chloride (Dichloromethane) 1.000
    91203 Naphthalene 0.994
    98953 Nitrobenzene 0.394
    79469 2-Nitropropane 0.989
    82688 Pentachloronitrobenzene (Quintobenzene) 0.839
    87865 Pentachlorophenol 0.0898
    75445 Phosgenec 1.000
    123386 Propionaldehyde 0.999
    78875 Propylene dichloride (1,2-Dichloropropane) 1.000
    75569 Propylene oxide 1.000
    75558 1,2-Propylenimine (2-Methyl aziridine) 0.945
    100425 Styrene 1.000
    96093 Styrene oxide 0.830
    79345 1,1,2,2-Tetrachloroethane 0.999
    127184 Tetrachloroethylene (Perchloroethylene) 1.000
    108883 Toluene 1.000
    95534 o-Toluidine 0.152
    120821 1,2,4-Trichlorobenzene 1.000
    71556 1,1,1-Trichloroethane (Methyl chlorform) 1.000
    79005 1,1,2-Trichloroethane (Vinyltrichloride) 1.000
    79016 Trichloroethylene 1.000
    95954 2,4,5-Trichlorophenol 0.0108
    88062 2,4,6-Trichlorophenol 0.0132
    121448 Triethylamine 1.000
    540841 2,2,4-Trimethylpentane 1.000
    108054 Vinyl acetate 1.000
    593602 Vinyl bromide 1.000
    75014 Vinyl chloride 1.000
    75354 Vinylidene chloride (1,1-Dichloroethylene) 1.000
    1330207 Xylenes (isomers and mixture) 1.000
    95476 o-Xylenes 1.000
    108383 m-Xylenes 1.000
    106423 p-Xylenes 1.000

    Notes:

    Fm 305 Fraction measure factor in Method 305, 40 CFR 305 part 63, appendix A.

    a CAS numbers refer to the Chemical Abstracts Services registry number assigned to specific compounds, isomers, or mixtures of compounds.

    b Denotes a HAP that hydrolyzes quickly in water, but the hydrolysis products are also HAP chemicals.

    c Denotes a HAP that may react violently with water.

    d Denotes a HAP that hydrolyzes slowly in water.

    e The Fm 305 factors for some of the more common glycol 305 ethers can be obtained by contacting the Waste and Chemical Processes Group, Office of Air Quality Planning and Standards, Research Triangle Park, NC 27711.

    [71 FR 69020, Nov. 29, 2006]