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Table Of Contents - Compound Summaries

This page last reviewed July 21, 2008

Lists of Toxic Air Contaminants

The following substance names are sorted alphabetically and provide a cross reference to the associated Chemical Abstract Service registry numbers (CAS) and Department of Transportation (DOT) numbers.

  Substance Name

CAS #

DOT #,+

       
  Acetaldehyde

75-07-0

1089

  Acetamide

60-35-5

 
  Acetonitrile

75-05-8

1648

  Acetophenone

98-86-2

 
  2-Acetylaminofluorene

53-96-3

 
  Acrolein

107-02-8

1092

  Acrylamide

79-06-1

2074

  Acrylic acid

79-10-7

2218

  Acrylonitrile

107-13-1

1093

  Allyl chloride

107-05-1

1100

  Aluminum and Compounds

7429-90-5

 
    Aluminum phosphide
(please see Aluminum and Compounds)

20859-73-8

 
  ++ Aluminum sulfate
(please see Aluminum and Compounds)

10043-01-3

1760/9078

  4-Aminobiphenyl

92-67-1

 
  Ammonia

7664-41-7

1005/2672/2073

++ Ammonium nitrate

6484-52-2

1942/0222/2426

++ Ammonium sulfate

7783-20-2

2506

  Aniline

62-53-3

1547

  o-Anisidine

90-04-0

2431

  Antimony Compounds

7440-36-0

2871

    Antimony trioxide
(please see Antimony Compounds)

1309-64-4

 
  Arsenic and Compounds

7440-38-2

1558

    Arsenic trioxide
(please see Arsenic and Compounds)

1327-53-3

 
    Arsine
(please see Arsenic and Compounds)

7784-42-1

2188

* Asbestos

1332-21-4

2212/2590

  Aziridine (Ethylene imine)

151-56-4

1185

++ Barium Compounds

7440-39-3

1399/1400/18

* Benzene

71-43-2

1114

  Benzidine

92-87-5

1885

  Benzo[a]pyrene

50-32-8

 
++ Benzotrichloride

98-07-7

2226

++ Benzoyl chloride

98-88-4

1736

  Benzyl chloride

100-44-7

1738

  Beryllium Compounds

7440-41-7

1566/1567

    Beryllium oxide
(please see Beryllium Compounds)

1304-56-9

 
    Beryllium sulfate
(please see Beryllium Compounds)

13510-49-1

 
  Biphenyl

92-52-4

 
  Bis(2-chloroethyl) ether (Dichloroethyl ether)

111-44-4

1916

  Bis(2-ethylhexyl)adipate

103-23-1

 
  Bis(2-ethylhexyl)phthalate (DEHP)

117-81-7

 
  Bis(chloromethyl)ether

542-88-1

2249

  Bromine Compounds (inorganic)

7726-95-6

1744

    Potassium bromate
(please see Bromine Compounds)

7758-01-2

 
  Bromoform

75-25-2

2515

  Bromomethane (Methyl bromide)

74-83-9

1062

* 1,3-Butadiene

106-99-0

1010

  2-Butanone (Methyl ethyl ketone)

78-93-3

1193/1232

  Butyl acrylate

141-32-2

2348

  n-Butyl alcohol

71-36-3

1120

  sec-Butyl alcohol

78-92-2

1120

  tert-Butyl alcohol

75-65-0

1120

  Butyl benzyl phthalate

85-68-7

 
* Cadmium and Cadmium Compounds

7440-43-9

2570

    Cadmium sulfate
(please see Cadmium and Cadmium Compounds)

10124-36-4

 
    Cadmium sulfide
(please see Cadmium and Cadmium Compounds)

1306-23-6

 
  Calcium cyanamide

156-62-7

1403

  Caprolactam

105-60-2

 
  Captan

133-06-2

9188

  Carbaryl

63-25-2

2757

  Carbon black extracts

1333-86-4

 
  Carbon disulfide

75-15-0

1131

* Carbon tetrachloride

56-23-5

1846

++ Carbonyl sulfide

463-58-1

2204

  Catechol

120-80-9

 
  Chloramben

133-90-4

 
  Chlordane

57-74-9

2762

  Chlorinated camphene (Toxaphene)

8001-35-2

2761

* Chlorinated dibenzofurans
(please see Chlorinated dioxins)

N/A

 
* Chlorinated dioxins

N/A

 
  Chlorinated fluorocarbons

76-13-1

 
  Chlorine

7782-50-5

1017

  Chlorine dioxide

10049-04

 
++ Chloroacetic acid

79-11-8

1750/1751

  2-Chloroacetophenone

532-27-4

1697

  Chlorobenzene

108-90-7

1134

  Chlorobenzilate

510-15-6

 
  Chloroethane (Ethyl chloride)

75-00-3

1037

  1-Chloro-2,3-epoxypropane (Epichlorohydrin)

106-89-8

2083

* Chloroform

67-66-3

1888

  Chloromethane (Methyl chloride)

74-87-3

1063

  Chloromethyl methyl ether

107-30-2

1239

  Chlorophenols

N/A

 
  ++ m-Chlorophenol
(please see Chlorophenols)

108-43-0

2020/2021

  ++ o-Chlorophenol
(please see Chlorophenols)

95-57-8

2020/2021

  ++ p-Chlorophenol
(please see Chlorophenols)

106-48-9

2020/2021

    2,3,4,6-tetrachlorophenol
(please see Chlorophenols)

58-90-2

 
  Chloroprene

126-99-8

1991

  Chromium and Compounds

7440-47-3

 
*   Chromium VI (Hexavalent chromium)
(please see Chromium and Compounds)

18540-29

 
  Cobalt Compounds

7440-48-4

 
    Cobalt(II) oxide
(please see Cobalt Compounds)

1307-96-6

 
  Coke Oven Emissions

N/A

 
  Copper Compounds

7440-50-8

 
    Copper sulfate
(please see Copper Compounds)

7758-98-7

 
  Creosotes

N/A

 
  ++ Coal tar
(please see Creosotes)

8001-58-9

1136

    Wood
(please see Creosotes)

8021-39-4

 
++ Cresols/Cresylic acid (isomers and mixture)

1319-77-3

2022/2076

    o-Cresol
(please see Cresols/Cresylic acid)

95-48-7

2076

    m-Cresol
(please see Cresols/Cresylic acid)

108-39-4

2076

    p-Cresol
(please see Cresols/Cresylic acid)

106-44-5

2076

  Crystalline silica

7631-86-9

 
    Quartz
(please see Crystalline silica)

14808-60-7

 
    Tridymite
(please see Crystalline silica)

15468-32-3

 
    Cristobalite
(please see Crystalline silica)

14464-46-1

 
  Cumene

98-82-8

1918

++ Cumene hydroperoxide

80-15-9

2116

  Cyanide Compounds

57-12-5

 
    Hydrocyanic acid
(please see Cyanide Compounds)

74-90-8

1051/1613

  Cyclohexane

110-82-7

1145

  2,4-D, salts and esters

94-75-7

2765

  DDE (p,p-Dichlorodiphenyldichloroethylene)

72-55-9

 
    DDT (Dichlorodiphenyltrichloroethane)
(please see DDE)

50-29-3

2761

  Decabromodiphenyl oxide

1163-19-5

 
  Di(2-ethylhexyl)phthalate (DEHP)

117-81-7

 
  Dialkylnitrosamines

N/A

 
    N-Nitroso-n-methylurea

684-93-5

 
    N-Nitrosodimethylamine

62-75-9

 
    N-Nitrosomorpholine

59-89-2

 
    N-Nitrosodiethylamine
(please see Dialkylnitrosamines)

55-18-5

 
  Diaminotoluene (mixed isomers)

N/A

 
    2,4-Toluene diamine

95-80-7

1709

    2,5-Diaminotoluene
(please see Diaminotoluene - mixed isomers)

95-70-5

 
    2,6-Diaminotoluene
(please see Diaminotoluene - mixed isomers)

823-40-5

 
    3,4-Diaminotoluene
(please see Diaminotoluene - mixed isomers)

496-72-0

 
  Diazomethane

334-88-3

 
  Dibenzofuran

132-64-9

 
  1,2-Dibromo-3-chloropropane (DBCP)

96-12-8

2872

* 1,2-Dibromoethane (Ethylene dibromide)

106-93-4

1605

  Dibutylphthalate

84-74-2

 
  1,4-Dichlorobenzene (p-Dicholorobenzene)

106-46-7

1592

  3,3'-Dichlorobenzidene

91-94-1

 
  1,1-Dichloroethane (Ethylidene dichloride)

75-34-3

2362

* 1,2-Dichloroethane (Ethylene dichloride)

107-06-2

1184

  Dichloroethyl ether (Bis(2-chloroethyl) ether)

111-44-4

1916

  1,1-Dichloroethylene (Vinylidene chloride)

75-35-4

1303

* Dichloromethane (Methylene chloride)

75-09-2

1593

  1,2-Dichloropropane (Propylene dichloride)

78-87-5

1279

  1,3-Dichloropropene (Telone)

542-75-6

2047

  Dichlorvos (DDVP)

62-73-7

2783

++ Dicofol

115-32-2

2761

** Diesel exhaust

N/A

 
  Diethanolamine

111-42-2

 
++ Diethyl sulfate

64-67-5

1594

  3,3'-Dimethoxybenzidine

119-90-4

 
  Dimethyl aminoazobenzene

60-11-7

 
  N,N-Dimethylaniline

121-69-7

2253

  3,3'-Dimethyl benzidine (o-Tolidine)

119-93-7

 
  Dimethyl carbamoyl chloride

79-44-7

2262

  Dimethyl formamide

68-12-2

2265

  1,1-Dimethyl hydrazine

57-14-7

1163

  Dimethyl phthalate

131-11-3

9188

  Dimethyl sulfate

77-78-1

1595

  4,6-Dinitro-o-cresol, and salts

534-52-1

1598

  2,4-Dinitrophenol

51-28-5

 
  2,4-Dinitrotoluene

121-14-2

 
  1,4-Dioxane

123-91-1

1165

  1,2-Diphenylhydrazine

122-66-7

 
  Environmental Tobacco Smoke

N/A

 
  Epichlorohydrin (1-Chloro-2,3-epoxypropane)

106-89-8

2083

  1,2-Epoxybutane

106-88-7

 
  Ethyl acrylate

140-88-5

1917

  Ethyl benzene

100-41-4

1175

  Ethyl carbamate (Urethane)

51-79-6

 
  Ethyl chloride (Chloroethane)

75-00-3

1037

* Ethylene dibromide (1,2-Dibromoethane)

106-93-4

1605

* Ethylene dichloride (1,2-Dichloroethane)

107-06-2

1184

  Ethylene glycol

107-21-1

 
  Ethylene imine (Aziridine)

151-56-4

1185

* Ethylene oxide

75-21-8

1040

  Ethylene thiourea

96-45-7

 
  Ethylidene dichloride (1,1-Dichloroethane)

75-34-3

2362

  Fine Mineral Fibers

N/A

 
* Formaldehyde

50-00-0

 
  Gasoline Vapors

N/A

 
  Glutaraldehyde

111-30-8

 
  Glycol ethers

N/A

 
    Ethylene glycol monoethyl ether
(please see Glycol ethers)

110-80-5

1171

  Heptachlor

76-44-8

2761

++ Hexachlorobenzene

118-74-1

2729

  Hexachlorobutadiene

87-68-3

2279

  Hexachlorocyclohexanes

608-73-1

 
    Lindane

58-89-9

2761

  Hexachlorocyclopentadiene

77-47-4

2646

  Hexachloroethane

67-72-1

9037

  Hexamethylene-1,6-diisocyanate

822-06-0

2281

  Hexamethylphosphoramide

680-31-9

 
  Hexane

110-54-3

1208

* Hexavalent chromium (Chromium VI)
(please see Chromium and Compounds)

18540-29-9

 
  Hexone (Methyl isobutyl ketone)

108-10-1

1245

  Hydrazine

302-01-2

2030/2029

  Hydrochloric acid

7647-01-0

1050/1789

  Hydrogen fluoride (Hydrofluoric acid)

7664-39-3

1052/1790

  Hydrogen sulfide

7783-06-4

1053

  Hydroquinone

123-31-9

2662

* Inorganic arsenic
(please see Arsenic and Compounds)

N/A

 
* Inorganic lead
(please see Lead and Compounds)

N/A

 
  Iodomethane (Methyl iodide)

74-88-4

2644

  Isophorone

78-59-1

1993

  Isopropyl alcohol

67-63-0

1219

  4,4'-Isopropylidenediphenol

80-05-7

 
  Lead and Compounds

7439-92-1

 
*   Inorganic lead
(please see Lead and Compounds)

N/A

 
  Lindane (all isomers)

58-89-9

2761

  Maleic anhydride

108-31-6

2215

  Manganese Compounds

7439-96-5

 
    Mancozeb
(please see Manganese Compounds)

8018-01-7

 
  Mercury Compounds

7439-97-6

2809

  ++ Mercuric chloride
(please see Mercury Compounds)

7487-94-7

1624

    Methyl mercury
(please see Mercury Compounds)

22967-92-6

 
  Methanol

67-56-1

1230

  Methoxychlor

72-43-5

2761

  2-Methyl aziridine (1,2-Propylenimine)

75-55-8

1921

  Methyl bromide (Bromomethane)

74-83-9

1062

++ Methyl tert-butyl ether (MTBE)

1634-04-4

2398

  Methyl chloride (Chloromethane)

74-87-3

1063

  Methyl chloroform (1,1,1-Trichloroethane)

71-55-6

2831

  Methyl ethyl ketone (2-Butanone)

78-93-3

1193/1232

  Methyl hydrazine

60-34-4

1244

  Methyl iodide (Iodomethane)

74-88-4

2644

  Methyl isobutyl ketone (Hexone)

108-10-1

1245

  Methyl isocyanate

624-83-9

2480

  Methyl methacrylate

80-62-6

1247

  4,4'-Methylene bis(2-chloroaniline)

101-14-4

 
* Methylene chloride (Dichloromethane)

75-09-2

1593

  Methylene diphenyl diisocyanate (MDI)

101-68-8

2489

  4,4-Methylenedianiline

101-77-9

 
  Molybdenum trioxide

1313-27-5

 
  Naphthalene

91-20-3

2304/1334

* Nickel and Compounds

7440-02-0

 
    Nickel carbonyl
(please see Nickel and Compounds)

13463-39-3

1259

  Nitric acid

7697-37-2

1760/2031/2032

  Nitrilotriacetic acid

139-13-9

 
  Nitrobenzene

98-95-3

1662

  4-Nitrobiphenyl

92-93-3

 
++ 4-Nitrophenol

100-02-7

1663

  2-Nitropropane

79-46-9

2608

  N-Nitroso-n-methylurea

684-93-5

 
  N-Nitrosodimethylamine

62-75-9

 
  N-Nitrosomorpholine

59-89-2

 
  Parathion

56-38-2

2783/2784

  Pentachloronitrobenzene (Quintozene)

82-68-8

 
  Pentachlorophenol

87-86-5

2020

++ Peracetic acid

79-21-0

2131

* Perchloroethylene (Tetrachloroethylene)

127-18-4

1897

  Phenol

108-95-2

1671/2312/2821

  p-Phenylenediamine

106-50-3

1673

  2-Phenylphenol

90-43-7

 
  Phosgene

75-44-5

1076

  Phosphine

7803-51-2

2199

  Phosphoric acid

7664-38-2

1805

  Phosphorus

7723-14-0

1381

  Phthalic anhydride

85-44-9

2214

++ Polychlorinated Biphenyls (PCBs)

1336-36-3

2315

  Polycyclic Organic Matter (POM)

50-32-8

 
    Acenaphthene
(please see POM)

83-32-9

 
    Acenaphthylene
(please see POM)

208-96-8

 
    Anthracene
(please see POM)

120-12-7

 
    Benzo[a]pyrene
(please see POM)

50-32-8

 
    Benzo[a]anthracene
(please see POM)

56-55-3

 
    Benzo[b]fluoranthene
(please see POM)

205-99-2

 
    Benzo[k]fluoranthene
(please see POM)

207-08-9

 
    Benzo[g,h,i]perylene
(please see POM)

191-24-2

 
    Chrysene
(please see POM)

218-01-9

 
    Dibenz[a,h]anthracene
(please see POM)

53-70-3

 
    Dibenz[a,e]pyrene
(please see POM)

192-65-4

 
    Fluoranthene
(please see POM)

206-44-0

 
    Fluorene
(please see POM)

86-73-7

 
    Indeno[1,2,3-cd]pyrene
(please see POM)

193-39-5

 
    Phenanthrene
(please see POM)

85-01-8

 
    Pyrene
(please see POM)

129-00-0

 
  1,3-Propane sultone

1120-71-4

 
++ Propene

115-07-1

1075/1077

  beta-Propiolactone

57-57-8

 
++ Propionaldehyde

123-38-6

1275

  Propoxur (Baygon)

114-26-1

 
  Propylene dichloride (1,2-Dichloropropane)

78-87-5

1279

  Propylene oxide

75-56-9

1280

  1,2-Propylenimine (2-Methyl aziridine)

75-55-8

1921

++ Quinoline

91-22-5

2656

  Quinone

106-51-4

2587

  Quintozene (Pentachloronitrobenzene)

82-68-8

 
  Radionuclides (including radon)

N/A

 
    Iodine
(please see Radionuclides)

7553-56-2

 
    Radon
(please see Radionuclides)

10043-92-2

 
  Selenium Compounds

7782-49-2

2658

    Selenium monosulfide
(please see Selenium Compounds)

7446-34-6

 
  Silver Compounds

7440-22-4

 
  Sodium hydroxide

1310-73-2

1823/1824

  Styrene

100-42-5

2055

  Styrene oxide

96-09-3

 
  Sulfuric acid

7664-93-9

1830/1831/1832

  Telone (1,3-Dichloropropene)

542-75-6

2047

  Terephthalic acid

100-21-0

 
  2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD)
(please see Chlorinated dioxins)

1746-01-6

 
  1,1,2,2-Tetrachloroethane

79-34-5

1702

* Tetrachloroethylene (Perchloroethylene)

127-18-4

1897

++ Thiourea

62-56-6

2877

++ Titanium tetrachloride

7550-45-0

1838

  o-Tolidine (3,3'-Dimethyl benzidine)

119-93-7

 
  Toluene

108-88-3

1294

  2,4-Toluene diamine (2,4-Diaminotoluene)

95-80-7

1709

  2,4-Toluene diisocyanate

584-84-9

2078

  o-Toluidine

95-53-4

1708

  Toxaphene (Chlorinated camphene)

8001-35-2

2761

  1,2,4-Trichlorobenzene

120-82-1

2321

  1,1,1-Trichloroethane (Methyl chloroform)

71-55-6

2831

  1,1,2-Trichloroethane

79-00-5

2831

* Trichloroethylene

79-01-6

1710

  2,4,5-Trichlorophenol

95-95-4

 
  2,4,6-Trichlorophenol

88-06-2

 
  Triethylamine

121-44-8

1296

  Trifluralin

1582-09-8

 
  1,2,4-Trimethylbenzene

95-63-6

2325

++ 2,2,4-Trimethylpentane

540-84-1

1262

  Urethane (Ethyl carbamate)

51-79-6

 
  Vinyl acetate

108-05-4

1301

  Vinyl bromide

593-60-2

1085

* Vinyl chloride

75-01-4

1086

  Vinylidene chloride (1,1-Dichloroethylene)

75-35-4

1303

++ Xylenes (isomers and mixture)

1330-20-7

1307

    m-Xylene
(please see Xylenes - isomers and mixture)

108-38-3

1307

    o-Xylene
(please see Xylenes - isomers and mixture)

95-47-6

1307

    p-Xylene
(please see Xylenes - isomers and mixture)

106-42-3

1307

++ Zinc Compounds

7440-66-6

1383/1436

    Zinc oxide
(please see Zinc Compounds)

1314-13-2

1516

# Number
+ Department of Transportation (DOT) identification number indicates that the chemical is regulated by DOT. This information was found in the NIOSH Pocket Guide to Chemical Hazards (June 1994).
++ Department of Transportation (DOT) identification number found in Dangerous Properties of Industrial Materials, seventh edition,1989, Sax.
* Substances which have already been identified by the Board as toxic air contaminants and which have potency numbers developed by the Office of Environmental Health Hazard Assessment and approved by the Scientific Review Panel.
** Substances currently under review for identification as toxic air contaminants.


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