Hawaii Administrative Rules › Title 11 - DEPARTMENT OF HEALTH › Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS › Chapter 60.1 - AIR POLLUTION CONTROL › Subchapter 9 - HAZARDOUS AIR POLLUTANT SOURCES › Section 11-60.1-172 - List of hazardous air pollutants

Current through June, 2024
The following are hazardous air pollutants:
CAS number
Chemical name
(1)
75070
Acetaldehyde
(2)
60355
Acetamide
(3)
75058
Acetonitrile
(4)
98862
Acetophenone
(5)
53963
2-Acetylaminofluorene
(6)
107028
Acrolein
(7)
79061
Acrylamide
(8)
79107
Acrylic acid
(9)
107131
Acrylonitrile
(10)
107051
Allyl chloride
(11)
92671
4-Aminobiphenyl
(12)
62533
Aniline
(13)
90040
o-Anisidine
(14)
1332214
Asbestos
(15)
71432
Benzene (including benzene from
								gasoline)
(16)
92875
Benzidine
(17)
98077
Benzotrichloride
(18)
100447
Benzyl chloride
(19)
92524
Biphenyl
(20)
117817
Bis(2-ethylhexyl)phthalate (DEHP)
(21)
542881
Bis(chloromethyl)ether
(22)
75252
Bromoform
(23)
106945
1-Bromopropane (l-BP)
(24)
106990
1,3-Butadiene
(25)
156627
Calcium cyanamide
(26)
133062
Captan
(27)
63252
Carbaryl
(28)
75150
Carbon disulfide
(29)
56235
Carbon tetrachloride
(30)
463581
Carbonyl sulfide
(31)
120809
Catechol
(32)
133904
Chloramben
(33)
57749
Chlordane
(34)
7782505
Chlorine
(35)
79118
Chloroacetic acid
(36)
532274
2-Chloroacetophenone
(37)
108907
Chlorobenzene
(38)
510156
Chlorobenzilate
(39)
67663
Chloroform
(40)
107302
Chloromethyl methyl ether
(41)
126998
Chloroprene
(42)
1319773
Cresols/Cresylic acid (isomers and
								mixture)
(43)
95487
o-Cresol
(44)
108394
m-Cresol
(45)
106445
p-Cresol
(46)
98828
Cumene
(47)
94757
2,4-D, salts and esters
(48)
3547044
DDE
(49)
334883
Diazomethane
(50)
132649
Dibenzofurans
(51)
96128
1,2-Dibromo-3-chloropropane
(52)
84742
Dibutylphthalate
(53)
106467
1,4-Dichlorobenzene(p)
(54)
91941
3,3-Dichlorobenzidene
(55)
111444
Dichloroethyl ether
								(Bis(2-chloroethyl)ether)
(56)
542756
1,3-Dichloropropene
(57)
62737
Dichlorvos
(58)
111422
Diethanolamina
(59)
121697
N,N-Diethyl aniline
								(N,N-Dimethylaniline)
(60)
64675
Diethyl sulfate
(61)
119904
3,3-Dimethoxybenzidine
(62)
60117
Dimethyl aminoazobenzene
(63)
119937
3,3-Dimethyl benzidine
(64)
79447
Dimethyl carbamoyl chloride
(65)
68122
Dimethyl formamide
(66)
57147
1,1-Dimethyl hydrazine
(67)
131113
Dimethyl phthalate
(68)
77781
Dimethyl sulfate
(69)
534521
4,6-Dinitro-o-cresol, and salts
(70)
51285
2,4-Dinitrophenol
(71)
121142
2, 4-Dinitrotoluene
(72)
123911
1,4-Dioxane (1,4-Diethyleneoxide)
(73)
122667
1,2-Diphenylhydrazine
(74)
106898
Epichlorohydrin
								(l-Chloro-2,3-epoxypropane)
(75)
106887
1,2-Epoxybutane
(76)
140885
Ethyl acrylate
(77)
100414
Ethyl benzene
(78)
51796
Ethyl carbamate (Urethane)
(79)
75003
Ethyl chloride (Chloroethane)
(80)
106934
Ethylene dibromide (Dibromoethane)
(81)
107062
Ethylene dichloride
								(1,2-Dichloroethane)
(82)
107211
Ethylene glycol
(83)
151564
Ethyleneimine (Aziridine)
(84)
75218
Ethylene oxide
(85)
96457
Ethylene thiourea
(86)
75343
Ethylidene dichloride
								(1,1-Dichloroethane)
(87)
50000
Formaldehyde
(88)
76448
Heptachlor
(89)
11874
Hexachlorobenzene
(90)
87683
Hexachlorobutadiene
(91)
77474
Hexachlorocyclopentadiene
(92)
67721
Hexachloroethane
(93)
82206
Hexamethylene-1,6-diisocyanate
(94)
680319
Hexamethylphosphoramide
(95)
110543
Hexane
(96)
302012
Hydrazine
(97)
7647010
Hydrochloric acid
(98)
7664393
Hydrogen fluoride (Hydrofluoric acid)
(99)
123319
Hydroquinone
(100)
78591
Isophorone
(101)
58899
Lindane (all isomers)
(102)
108316
Maleic anhydride
(103)
67561
Methanol
(104)
72435
Methoxychlor
(105)
74839
Methyl bromide (Bromomethane)
(106)
74873
Methyl chloride (Chloromethane)
(107)
71556
Methyl chloroform
								(1,1,1-Trichloroethane)
(108)
60344
Methyl hydrazine
(109)
74884
Methyl iodide (lodomethane)
(110)
108101
Methyl isobutyl ketone (Hexone)
(111)
624839
Methyl isocyanate
(112)
80626
Methyl methacrylate
(113)
1634044
Methyl tert butyl ether
(114)
101144
4,4-Methylene
bis(2-chloroaniline)
(115)
75092
Methylene chloride (Dichloromethane)
(116)
101688
Methylene diphenyl diisocyanate (MDI)
(117)
101779
4,4'-Methylenedianiline
(118)
91203
Naphthalene
(119)
98953
Nitrobenzene
(120)
92933
4-Nitrobiphenyl
(121)
100027
4-Nitrophenol
(122)
79469
2-Nitropropane
(123)
684935
N-Nitroso-N-methylurea
(124)
62759
N-Nitrosodimethylamine
(125)
59892
N-Nitrosomorpholine
(126)
56382
Parathion
(127)
82688
Pentachloronitrobenzene (Quintobenzene)
(128)
87865
Pentachlorophenol
(129)
108952
Phenol
(130)
106503
p-Phenylenedi amine
(131)
75445
Phosgene
(132)
7803512
Phosphine
(133)
7723140
Phosphorus
(134)
85449
Phthalic anhydride
(135)
1336363
Polychlorinated biphenyls (Aroclors)
(136)
1120714
1,3-Propane sultone
(137)
57578
beta-Propiolactone
(138)
123386
Propionaldehyde
(139)
114261
Propoxur (Baygon)
(140)
78875
Propylene dichloride
								(1,2-Dichloropropane)
(141)
75569
Propylene oxide
(142)
75558
1,2-Propylenimine (2-Methylaziridine)
(143)
91225
Quinoline
(144)
106514
Quinone
(145)
100425
Styrene
(146)
96093
Styrene oxide
(147)
1746016
2,3,7,8-Tetrachlorodibenzo-p-dioxin
(148)
79345
1,1,2,2-Tetrachloroethane
(149)
127184
Tetrachloroethylene (Perchloroethylene)
(150)
7550450
Titanium tetrachloride
(151)
108883
Toluene
(152)
95807
2,4-Toluene diamine
(153)
584849
2,4-Toluene diisocyanate
(154)
95534
o-Toluidine
(155)
8001352
Toxaphene (chlorinated camphene)
(156)
120821
1,2,4-Trichlorobenzene
(157)
79005
1,1,2-Trichloroethane
(158)
79016
Trichloroethylene
(159)
95954
2,4,5-Trichlorophenol
(160)
88062
2,4,6-Trichlorophenol
(161)
121448
Triethylamine
(162)
1582098
Trifluralin
(163)
540841
2,2,4-Trimethylpentane
(164)
108054
Vinyl acetate
(165)
593602
Vinyl bromide
(166)
75014
Vinyl
(167)
75354
Vinylidene chloride
								(1,1-Dichloroethylene)
(168)
1330207
Xylenes (isomers and mixture)
(169)
95476
o-Xylenes
(170)
108383
m-Xylenes
(171)
106423
p-Xylenes
(172)
0
Antimony Compounds
(173)
0
Arsenic Compounds (inorganic including
								arsine)
(174)
0
Beryllium Compounds
(175)
0
Cadmium Compounds
(176)
0
Chromium Compounds
(177)
0
Cobalt Compounds
(178)
0
Coke Oven Emissions
(179)
0
Cyanide Compounds 
								1
(180)
0
Glycol ethers 
								2
(181)
0
Lead Compounds
(182)
0
Manganese Compounds
(183)
0
Mercury Compounds
(184)
0
Fine mineral fibers 
								3
(185)
0
Nickel Compounds
(186)
0
Polycyclic Organic Matter 
								4
(187)
0
Radionuclides (including radon) 
								5
(188)
0
Selenium Compounds
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 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.
3 Includes mineral fiber
					 emissions from facilities manufacturing or processing glass, rock, or slag
					 fibers (or other mineral derived fibers) of average diameter one 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°C.
5 A type of atom which
					 spontaneously undergoes radioactive decay.