Source: EPA (Retrieved October 2019)
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CAS NUMBER
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CHEMICAL NAME
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CAS NUMBER
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CHEMICAL NAME
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|
75070
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Acetaldehyde
|
302012
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Hydrazine
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|
60355
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Acetamide
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7647010
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Hydrochloric acid
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|
75058
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Acetonitrile
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7664393
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Hydrogen fluoride (Hydrofluoric acid)
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|
98862
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Acetophenone
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7783064
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Hydrogen sulfide (See Modification)
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|
53963
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2-Acetylaminofluorene
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123319
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Hydroquinone
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|
107028
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Acrolein
|
78591
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Isophorone
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|
79061
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Acrylamide
|
58899
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Lindane (all isomers)
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|
79107
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Acrylic acid
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108316
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Maleic anhydride
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|
107131
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Acrylonitrile
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67561
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Methanol
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|
107051
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Allyl chloride
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72435
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Methoxychlor
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|
92671
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4-Aminobiphenyl
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74839
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Methyl bromide (Bromomethane)
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|
62533
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Aniline
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74873
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Methyl chloride (Chloromethane)
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|
90040
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o-Anisidine
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71556
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Methyl chloroform (1,1,1-Trichloroethane)
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|
1332214
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Asbestos
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78933
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Methyl ethyl ketone (2-Butanone) (See Modification)
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71432
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Benzene (including benzene from gasoline)
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60344
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Methyl hydrazine
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92875
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Benzidine
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74884
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Methyl iodide (Iodomethane)
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98077
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Benzotrichloride
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108101
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Methyl isobutyl ketone (Hexone)
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|
100447
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Benzyl chloride
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624839
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Methyl isocyanate
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|
92524
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Biphenyl
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80626
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Methyl methacrylate
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|
117817
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Bis(2-ethylhexyl)phthalate (DEHP)
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1634044
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Methyl tert butyl ether
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|
542881
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Bis(chloromethyl)ether
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101144
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4,4-Methylene bis(2-chloroaniline)
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|
75252
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Bromoform
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75092
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Methylene chloride (Dichloromethane)
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|
106990
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1,3-Butadiene
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101688
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Methylene diphenyl diisocyanate (MDI)
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|
156627
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Calcium cyanamide
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101779
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4,4'-Methylenedianiline
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|
105602
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Caprolactam (See Modification)
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91203
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Naphthalene
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|
133062
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Captan
|
98953
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Nitrobenzene
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|
63252
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Carbaryl
|
92933
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4-Nitrobiphenyl
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|
75150
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Carbon disulfide
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100027
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4-Nitrophenol
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|
56235
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Carbon tetrachloride
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79469
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2-Nitropropane
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|
463581
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Carbonyl sulfide
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684935
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N-Nitroso-N-methylurea
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|
120809
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Catechol
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62759
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N-Nitrosodimethylamine
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|
133904
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Chloramben
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59892
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N-Nitrosomorpholine
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|
57749
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Chlordane
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56382
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Parathion
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7782505
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Chlorine
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82688
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Pentachloronitrobenzene (Quintobenzene)
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79118
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Chloroacetic acid
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87865
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Pentachlorophenol
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532274
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2-Chloroacetophenone
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108952
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Phenol
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108907
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Chlorobenzene
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106503
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p-Phenylenediamine
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|
510156
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Chlorobenzilate
|
75445
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Phosgene
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|
67663
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Chloroform
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7803512
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Phosphine
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|
107302
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Chloromethyl methyl ether
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7723140
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Phosphorus
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126998
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Chloroprene
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85449
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Phthalic anhydride
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|
1319773
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Cresols/Cresylic acid (isomers and mixture)
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1336363
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Polychlorinated biphenyls (Aroclors)
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|
95487
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o-Cresol
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1120714
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1,3-Propane sultone
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108394
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m-Cresol
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57578
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beta-Propiolactone
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106445
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p-Cresol
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123386
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Propionaldehyde
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|
98828
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Cumene
|
114261
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Propoxur (Baygon)
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|
94757
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2,4-D, salts and esters
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78875
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Propylene dichloride (1,2-Dichloropropane)
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|
3547044
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DDE
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75569
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Propylene oxide
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334883
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Diazomethane
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75558
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1,2-Propylenimine (2-Methyl aziridine)
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132649
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Dibenzofurans
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91225
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Quinoline
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96128
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1,2-Dibromo-3-chloropropane
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106514
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Quinone
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84742
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Dibutylphthalate
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100425
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Styrene
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106467
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1,4-Dichlorobenzene(p)
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96093
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Styrene oxide
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91941
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3,3-Dichlorobenzidene
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1746016
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2,3,7,8-Tetrachlorodibenzo-p-dioxin
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111444
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Dichloroethyl ether (Bis(2-chloroethyl)ether)
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79345
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1,1,2,2-Tetrachloroethane
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542756
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1,3-Dichloropropene
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127184
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Tetrachloroethylene (Perchloroethylene)
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|
62737
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Dichlorvos
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7550450
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Titanium tetrachloride
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|
111422
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Diethanolamine
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108883
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Toluene
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121697
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N,N-Dimethylaniline
|
95807
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2,4-Toluene diamine
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|
64675
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Diethyl sulfate
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584849
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2,4-Toluene diisocyanate
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119904
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3,3-Dimethoxybenzidine
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95534
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o-Toluidine
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60117
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Dimethyl aminoazobenzene
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8001352
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Toxaphene (chlorinated camphene)
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119937
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3,3'-Dimethyl benzidine
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120821
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1,2,4-Trichlorobenzene
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|
79447
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Dimethyl carbamoyl chloride
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79005
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1,1,2-Trichloroethane
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68122
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Dimethyl formamide
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79016
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Trichloroethylene
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|
57147
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1,1-Dimethyl hydrazine
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95954
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2,4,5-Trichlorophenol
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131113
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Dimethyl phthalate
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88062
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2,4,6-Trichlorophenol
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|
77781
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Dimethyl sulfate
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121448
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Triethylamine
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534521
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4,6-Dinitro-o-cresol, and salts
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1582098
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Trifluralin
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|
51285
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2,4-Dinitrophenol
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540841
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2,2,4-Trimethylpentane
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|
121142
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2,4-Dinitrotoluene
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108054
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Vinyl acetate
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123911
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1,4-Dioxane (1,4-Diethyleneoxide)
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593602
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Vinyl bromide
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122667
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1,2-Diphenylhydrazine
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75014
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Vinyl chloride
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106898
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Epichlorohydrin (l-Chloro-2,3-epoxypropane)
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75354
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Vinylidene chloride (1,1-Dichloroethylene)
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|
106887
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1,2-Epoxybutane
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1330207
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Xylenes (isomers and mixture)
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|
140885
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Ethyl acrylate
|
95476
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o-Xylenes
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|
100414
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Ethyl benzene
|
108383
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m-Xylenes
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|
51796
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Ethyl carbamate (Urethane)
|
106423
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p-Xylenes
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|
75003
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Ethyl chloride (Chloroethane)
|
0
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Antimony Compounds
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|
106934
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Ethylene dibromide (Dibromoethane)
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0
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Arsenic Compounds (inorganic including arsine)
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|
107062
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Ethylene dichloride (1,2-Dichloroethane)
|
0
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Beryllium Compounds
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|
107211
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Ethylene glycol
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0
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Cadmium Compounds
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|
151564
|
Ethylene imine (Aziridine)
|
0
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Chromium Compounds
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|
75218
|
Ethylene oxide
|
0
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Cobalt Compounds
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|
96457
|
Ethylene thiourea
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0
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Coke Oven Emissions
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|
75343
|
Ethylidene dichloride (1,1-Dichloroethane)
|
0
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Cyanide Compounds 1
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|
50000
|
Formaldehyde
|
0
|
Glycol ethers 2 (See Modification)
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|
76448
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Heptachlor
|
0
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Lead Compounds
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|
118741
|
Hexachlorobenzene
|
0
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Manganese Compounds
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|
87683
|
Hexachlorobutadiene
|
0
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Mercury Compounds
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|
77474
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Hexachlorocyclopentadiene
|
0
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Fine mineral fibers 3
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|
67721
|
Hexachloroethane
|
0
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Nickel Compounds
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|
822060
|
Hexamethylene-1,6-diisocyanate
|
0
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Polycyclic Organic Matter 4
|
|
680319
|
Hexamethylphosphoramide
|
0
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Radionuclides (including radon) 5
|
|
110543
|
Hexane
|
0
|
Selenium Compounds
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NOTE: For all listings above which contain the word "compounds" and for glycol ethers, the following applies: Unless otherwise specified, these listings are defined as including any unique chemical substance that contains the named chemical (i.e., antimony, arsenic, etc.) as part of that chemical's infrastructure.
1 - X'CN where X = H' or any other group where a formal dissociation may occur. For example KCN or Ca(CN)2
2 - Includes mono- and di- ethers of ethylene glycol, diethylene glycol, and triethylene glycol R-(OCH2CH2)n -OR' where
n = 1, 2, or 3
R = alkyl or aryl groups
R' = R, H, or groups which, when removed, yield glycol ethers with the structure: R-(OCH2CH)n-OH. Polymers are excluded from the glycol category. (See Modification)
3 - Includes mineral fiber emissions from facilities manufacturing or processing glass, rock, or slag fibers (or other mineral derived fibers) of average diameter 1 micrometer or less.
4 - Includes organic compounds with more than one benzene ring, and which have a boiling point greater than or equal to 100 ºC.
5 - A type of atom which spontaneously undergoes radioactive decay.
Modifications
Pollutants removed from the list of hazardous air pollutants:
Methyl Ethyl Ketone – removed from the list of hazardous air pollutants in December 2005 - Federal Register - December 19, 2005 (70 FR 75047).
Ethylene glycol monobutyl ether (EGBE) (2-Butoxyethanol) - removed from the list of hazardous air pollutants (glycol ethers category) in November 2004 - Federal Register - November 29, 2004 (69 FR 69320).
Caprolactam – removed from the list of hazardous air pollutants in June 1996 - Federal Register - June 18, 1996 (61 FR 30816).
Hydrogen Sulfide – added to the list inadvertently but removed by Congress with Presidential approval in 1991.
Surfactant alcohol ethoxylates and their derivatives - removed from the list of hazardous air pollutants in August 2000 - Federal Register – August 2, 2000 (65 FR 47342). To implement this action, EPA revised footnote 2 of the list (42 U.S.C. 7412(b)(1)) to read as follows:
2 - Includes mono- and di-ethers of ethylene glycol, diethylene glycol, and triethylene glycol R-(OCH2CH2)n-OR' , where:
n = 1, 2, or 3;
R = alkyl C7 or less; or R = phenyl or alkyl substituted phenyl;
R' = H or alkyl C7 or less; or OR’ consisting of carboxylic acid ester, sulfate, phosphate, nitrate, or sulfonate.
Pollutants under consideration for adding to the list of hazardous air pollutants:
n-Propyl Bromide - On December 28, 2016, EPA issued a draft notice of the agency's rationale for granting petitions to add n-Propyl Bromide (nPB) - also known as 1-bromopropane (1-BP) - to the list of hazardous air pollutants. The agency is seeking comments on its technical review of the petitions. Learn more.