40 CFR Table 1 to Subpart GGGGG of Part 63: 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)ether b 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 ether b 1.000

126998 Chloroprene 1.000

98828 Cumene 1.000

94757 2,4-D, salts and esters 0.167

334883 Diazomethane c 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 chloride c 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 ethers d 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 Phosgene c 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.