CAS Numbers

(Chemical Abstracts Service Registry Numbers)

 
The following substance names are sorted by Chemical Abstracts Service registry numbers and provide a cross reference to the associated Department of Transportation (DOT) number/ARB Emittent ID and substance name.
 

CAS # / ARB Emitent ID

 

DOT #,+

 Substance Name

 

    

50-00-0

  

*

Formaldehyde

50-29-3

 

2761

 DDT (Dichlorodiphenyltrichloroethane) (Please see DDE.)

50-32-8

  

*

Benzo[a]pyrene (Please see POM.)

51-28-5

   2,4-Dinitrophenol

51-79-6

  

*

Ethyl Carbamate (Urethane)

53-70-3

  

*

Dibenz[a,h]anthracene (Please see POM.)

53-96-3

   2-Acetylaminofluorene

55-18-5

   N-Nitrosodiethylamine (Please see Dialkylnitrosamines.)

56-23-5

 

1846

*

Carbon Tetrachloride

56-38-2

 

2783/2784

 Parathion

56-49-5

  

*

3-Methylcholanthrene

56-55-3

  

*

Benzo[a]anthracene (Please see POM.)

57-12-5

  

*

Cyanide Compounds

57-14-7

 

1163

 1,1-Dimethyl Hydrazine

57-57-8

   Beta-Propiolactone

57-74-9

 

2762

 Chlordane

57-97-6

  

*

7,12-Dimethylbenz[a]anthracene

58-89-9

 

2761

*

Lindane (All Isomers)

58-90-2

   2,3,4,6-Tetrachlorophenol (Please see Chlorophenols.)

59-89-2

   N-Nitrosomorpholine

60-11-7

   Dimethyl Aminoazobenzene

60-34-4

 

1244

 Methyl Hydrazine

60-35-5

  

*

Acetamide

62-53-3

 

1547

*

Aniline

62-56-6

 

2877

++

Thiourea

62-73-7

 

2783

 Dichlorvos (DDVP)

62-75-9

  

*

N-Nitrosodimethylamine

63-25-2

 

2757

 Carbaryl

64-67-5

 

1594

++

Diethyl Sulfate

67-56-1

 

1230

*

Methanol

67-63-0

 

1219

 Isopropyl Alcohol

67-66-3

 

1888

*

Chloroform

67-72-1

 

9037

*

Hexachloroethane

68-12-2

 

2265

*

Dimethyl Formamide

71-36-3

 

1120

 N-Butyl Alcohol

71-43-2

 

1114

*

Benzene

71-55-6

 

2831

*

Methyl Chloroform (1,1,1-Trichloroethane)

72-43-5

 

2761

 Methoxychlor

72-55-9

   DDE (P,P-Dichlorodiphenyldichloroethylene)

74-83-9

 

1062

*

Methyl Bromide (Bromomethane)

74-87-3

 

1063

 Methyl Chloride (Chloromethane)

74-88-4

 

2644

 Methyl Iodide (Iodomethane)

74-90-8

 

1613/1051

 Hydrocyanic Acid (Please see Cyanide Compounds.)

75-00-3

 

1037

*

Ethyl Chloride (Chloroethane)

75-01-4

 

1086

*

Vinyl Chloride

75-05-8

 

1648

 Acetonitrile

75-07-0

 

1089

*

Acetaldehyde

75-09-2

 

1593

*

Methylene Chloride (Dichloromethane)

75-15-0

 

1131

*

Carbon Disulfide

75-21-8

 

1040

*

Ethylene Oxide

75-25-2

 

2515

 Bromoform

75-34-3

 

2362

*

Ethylidene Dichloride (1,1-Dichloroethane)

75-35-4

 

1303

*

Vinylidene Dhloride (1,1-Dichloroethylene)

75-43-4

   Dichlorofluoromethane {Freon 21}

75-44-5

 

1076

*

Phosgene

75-55-8

 

1921

 1,2-Propylenimine (2-Methyl Aziridine)

75-56-9

 

1280

*

Propylene Oxide

75-65-0

 

1120

 Tert-Butyl Alcohol

75-71-8

   Dichlorodifluoromethane {Freon 12}

76-13-1

   Chlorinated Fluorocarbons

76-44-8

 

2761

 Heptachlor

77-47-4

 

2646

 Hexachlorocyclopentadiene

77-78-1

 

1595

 Dimethyl Sulfate

78-59-1

 

1993

*

Isophorone

78-87-5

 

1279

 Propylene Dichloride (1,2-Dichloropropane)

78-92-2

 

1120

 Sec-Butyl Alcohol

78-93-3

 

1193/1232

*

Methyl Ethyl Ketone (2-Butanone)

79-00-5

 

2831

*

1,1,2-Trichloroethane

79-01-6

 

1710

*

Trichloroethylene

79-06-1

 

2074

*

Acrylamide

79-10-7

 

2218

*

Acrylic Acid

79-11-8

 

1750/1751

++

Chloroacetic Acid

79-21-0

 

2131

++

Peracetic Acid

79-34-5

 

1702

*

1,1,2,2-Tetrachloroethane

79-44-7

 

2262

 Dimethyl Carbamoyl Chloride

79-46-9

 

2608

*

2-Nitropropane

80-05-7

   4,4'-Isopropylidenediphenol

80-15-9

 

2116

++

Cumene Hydroperoxide

80-62-6

 

1247

*

Methyl Methacrylate

82-68-8

   Pentachloronitrobenzene (Quintozene)

83-32-9

   Acenaphthene (Please see POM.)

84-74-2

   Dibutylphthalate

85-01-8

   Phenanthrene (Please see POM.)

85-44-9

 

2214

*

Phthalic Anhydride

85-68-7

   Butyl Benzyl Phthalate

86-30-6

   N-Nitrosodiphenylamine

86-73-7

   Fluorene (Please see POM.)

87-68-3

 

2279

 Hexachlorobutadiene

87-86-5

 

2020

*

Pentachlorophenol

88-06-2

  

*

2,4,6-Trichlorophenol

90-04-0

 

2431

 O-Anisidine

90-43-7

   2-Phenylphenol

91-20-3

 

1334/2304

*

Naphthalene

91-22-5

 

2656

++

Quinoline

91-94-1

  

*

3,3'-Dichlorobenzidene

92-52-4

   Biphenyl

92-67-1

   4-Aminobiphenyl

92-87-5

 

1885

 Benzidine

92-93-3

   4-Nitrobiphenyl

94-75-7

 

2765

 2,4-D, Salts and Esters

95-47-6

 

1307

* 

O-Xylene (Please see Xylenes - Isomers and Mixture.)

95-48-7

 

2076

 O-Cresol (Please see Cresols.)

95-53-4

 

1708

 O-Toluidine

95-57-8

 

2020/2021

++

O-Chlorophenol (Please see Chlorophenols.)

95-63-6

 

2325

 1,2,4-Trimethylbenzene

95-70-5

   2,5-Diaminotoluene
(Please see Diaminotoluene - Mixed Isomers.)

95-80-7

 

1709

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

95-95-4

   2,4,5-Trichlorophenol

96-09-3

  

*

Styrene Oxide

96-12-8

 

2872

 1,2-Dibromo-3-Chloropropane (DBCP)

96-45-7

  

*

Ethylene Thiourea

98-07-7

 

2226

++

Benzotrichloride

98-82-8

 

1918

 Cumene

98-86-2

   Acetophenone

98-88-4

 

1736

++

Benzoyl Chloride

98-95-3

 

1662

*

Nitrobenzene

100-02-7

 

1663

++

4-Nitrophenol

100-21-0

   Terephthalic Acid

100-41-4

 

1175

*

Ethyl Benzene

100-42-5

 

2055

*

Styrene

100-44-7

 

1738

*

Benzyl Chloride

101-14-4

  

*

4,4'-Methylene Bis(2-Chloroaniline)

101-68-8

 

2489

*

Methylene Diphenyl Diisocyanate (MDI)

101-77-9

  

*

4,4-Methylenedianiline

103-23-1

   Bis(2-Ethylhexyl)Adipate

105-60-2

   Caprolactam

106-42-3

 

1307

*

P-Xylene (Please see Xylenes - Isomers and Mixture)

106-44-5

 

2076

 P-Cresol (Please see Cresols.)

106-46-7

 

1592

*

1,4-Dichlorobenzene (P-Dicholorobenzene)

106-48-9

 

2020/2021

++

P-Chlorophenol (Please see Chlorophenols.)

106-50-3

 

1673

 P-Phenylenediamine

106-51-4

 

2587

 Quinone

106-88-7

  

*

1,2-Epoxybutane

106-89-8

 

2083

*

Epichlorohydrin

106-93-4

 

1605

*

Ethylene Dibromide (1,2-Dibromoethane)

106-99-0

 

1010

*

1,3-Butadiene

107-02-8

 

1092

*

Acrolein

107-05-1

 

1100

*

Allyl Chloride

107-06-2

 

1184

*

Ethylene Dichloride (1,2-Dichloroethane)

107-13-1

 

1093

*

Acrylonitrile

107-21-1

  

*

Ethylene Glycol

107-30-2

 

1239

 Chloromethyl Methyl Ether

108-05-4

 

1301

*

Vinyl Acetate

108-10-1

 

1245

 Methyl Isobutyl Ketone (Hexone)

108-31-6

 

2215

*

Maleic Anhydride

108-38-3

 

1307

*

M-Xylene (Please see Xylenes - Isomers and Mixture.)

108-39-4

 

2076

 M-Cresol (Please see Cresols.)

108-43-0

 

2020/2021

++

M-Chlorophenol (Please see Chlorophenols.)

108-88-3

 

1294

*

Toluene

108-90-7

 

1134

*

Chlorobenzene

108-95-2

 

1671/2312/2821

*

Phenol

109-86-4

  

*

Ethylene Glycol Monomethyl Ether

110-49-6

   Ethylene Glycol Monomethyl Ether Acetate

110-54-3

 

1208

*

Hexane

110-80-5

 

1171

*

Ethylene Glycol Monoethyl Ether (Please see Glycol Ethers.)

110-82-7

 

1145

 Cyclohexane

111-15-9

  

 *

Ethylene Glycol Monoethyl Ether Acetate

111-30-8

   Glutaraldehyde

111-42-2

  

*

Diethanolamine

111-44-4

 

1916

 Dichloroethyl Ether (Bis(2-Chloroethyl) Ether)

111-76-2

  

*

Ethylene Glycol Monobutyl Ether

114-26-1

   Propoxur (Baygon)

115-07-1

 

1075/1077

++

Propene

115-32-2

 

2761

++

Dicofol

117-81-7

  

*

Bis(2-Ethylhexyl)Phthalate (DEHP)

118-74-1

 

2729

* ++

Hexachlorobenzene

119-90-4

   3,3'-Dimethoxybenzidine

119-93-7

   3,3'-Dimethyl Benzidine (O-Tolidine)

120-12-7

   Anthracene (Please see POM.)

120-80-9

   Catechol

120-82-1

 

2321

 1,2,4-Trichlorobenzene

121-14-2

   2,4-Dinitrotoluene

121-44-8

 

1296

*

Triethylamine

121-69-7

 

2253

 N,N-Dimethylaniline

122-66-7

   1,2-Diphenylhydrazine

123-31-9

 

2662

 Hydroquinone

123-38-6

 

1275

++

Propionaldehyde

123-91-1

 

1165

*

1,4-Dioxane

126-99-8

 

1991

 Chloroprene

127-18-4

 

1897

*

Tetrachloroethylene (Perchloroethylene)

129-00-0

   Pyrene (Please see POM.)

131-11-3

 

9188

 Dimethyl Phthalate

132-64-9

   Dibenzofuran

133-06-2

 

9188

 Captan

133-90-4

   Chloramben

139-13-9

   Nitrilotriacetic Acid

140-88-5

 

1917

 Ethyl Acrylate

141-32-2

 

2348

 Butyl Acrylate

151-56-4

 

1185

 Ethylene Imine (Aziridine)

156-62-7

 

1403

 Calcium Cyanamide

189-55-9

  

*

Dibenzo[a,i]pyrene

189-64-0

  

*

Dibenzo[a,h]pyrene

191-30-0

  

*

Dibenzo[a,l]pyrene

191-24-2

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

192-65-4

  

*

Dibenz[a,e]pyrene (Please see POM.)

193-39-5

  

*

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

194-59-2

  

*

7H-Dibenzo[c,g]carbazole

205-82-3

  

*

Benzo[j]fluoranthene

205-99-2

  

*

Benzo[b]fluoranthene (Please see POM.)

206-44-0

   Fluoranthene (Please see POM.)

207-08-9

  

*

Benzo[k]fluoranthene (Please see POM.)

208-96-8

   Acenaphthylene (Please see POM.)

218-01-9

  

*

Chrysene (Please see POM.)

224-42-0

  

*

Dibenz[a,j]acridine

226-36-8

  

*

Dibenz[a,h]acridine

302-01-2

 

2029/2030

*

Hydrazine

334-88-3

   Diazomethane

463-58-1

 

2204

++

Carbonyl Sulfide

496-72-0

   3,4-Diaminotoluene (Please see Diaminotoluene - Mixed Isomers.)

510-15-6

   Chlorobenzilate

532-27-4

 

1697

 2-Chloroacetophenone

534-52-1

 

1598

 4,6-Dinitro-O-Cresol and Salts

540-84-1

 

1262

++

2,2,4-Trimethylpentane

540-88-5

   t-Butyl acetate

542-75-6

 

2047

 1,3-Dichloropropene (Telone)

542-88-1

 

2249

*

Bis(Chloromethyl)Ether

584-84-9

 

2078

*

2,4-Toluene Diisocyanate

593-60-2

 

1085

 Vinyl Bromide

602-87-9

  

*

5-Nitroacenaphthene

607-57-8

  

*

2-Nitrofluorene

608-73-1

   Hexachlorocyclohexanes

624-83-9

 

2480

*

Methyl Isocyanate

680-31-9

   Hexamethylphosphoramide

684-93-5

   N-Nitroso-N-Methylurea

822-06-0

 

2281

*

Hexamethylene-1,6-Diisocyanate

823-40-5

   2,6-Diaminotoluene
(Please see Diaminotoluene - Mixed Isomers)

1120-71-4

  

*

1,3-Propane Sultone

1163-19-5

   Decabromodiphenyl Oxide

1304-56-9

   Beryllium Oxide (Please see Beryllium Compounds.)

1306-23-6

   Cadmium Sulfide
(Please see Cadmium and Cadmium Compounds.)

1307-96-6

   Cobalt (II) Oxide (Please see Cobalt Compounds.)

1309-64-4

  

*

Antimony Trioxide (Please see Antimony Compounds.)

1310-73-2

 

1823/1824

 Sodium Hydroxide

1313-27-5

   Molybdenum Trioxide

1314-13-2

 

1516

 Zinc Oxide (Please see Zinc Compounds.)

1314-62-1

   Vanadium Pentoxide

1319-77-3

 

2022/2076

* ++

Cresols / Cresylic Acid (Isomers and Mixture.)

1327-53-3

   Arsenic Trioxide (Please see Arsenic and Compounds.)

1330-20-7

 

1307

* ++

Xylenes (Isomers and Mixture)

1332-21-4

 

2212/2590

*

Asbestos

1333-86-4

   Carbon Black Extracts

1336-36-3

 

2315

* ++

Polychlorinated Biphenyls (PCBs)

1582-09-8

   Trifluralin

1634-04-4

 

2398

* ++

Methyl Tert-Butyl Ether (MTBE)

1746-01-6

  

*

2,3,7,8-Tetrachlorodibenzo-P-Dioxin (TCDD)
(Please see Chlorinated Dioxins.)

2795-39-3

   Perfluorooctanoic acid (PFOA) and its salts, esters, and sulfonates

3268-87-9

  

*

1,2,3,4,6,7,8,9-Octachlorodibenzo-p-Dioxin

3697-24-3

  

*

5-Methylchrysene

4239-76-48

  

*

1,6-Dinitropyrene

4239-76-59

  

*

1,8-Dinitropyrene

5120-73-19

  

*

2,3,7,8-Tetrachlorodibenzofuran

5522-43-0

  

 *

1-Nitropyrene

3333-67-3

   Nickel carbonate

6484-52-2

 

0222/1942/2426

++

Ammonium Nitrate

7429-90-5

   Aluminum and Compounds

7439-92-1

   *Lead and Compounds

7439-96-5

   *Manganese Compounds

7439-97-6

 

2809

 *Mercury Compounds

7440-02-0

  

*

Nickel and Compounds

7440-22-4

   Silver Compounds

7440-36-0

 

2871

*

Antimony Compounds

7440-38-2

 

1558

*

Arsenic and Compounds

7440-39-3

 

1399/1400/1854

++

Barium Compounds

7440-41-7

 

1566/1567

*

Beryllium Compounds

7440-43-9

 

2570

*

Cadmium and Cadmium Compounds

7440-47-3

  

*

Chromium and Compounds

7440-48-4

  

*

Cobalt Compounds

7440-50-8

   Copper Compounds

7440-66-6

 

1383/1436

++

Zinc Compounds

7446-34-6

   Selenium Monosulfide (Please see Selenium Compounds.)

7446-71-9

   Sulfur Trioxide

7487-94-7

 

1624

++

Mercuric Chloride (Please see Mercury Compounds.)

7550-45-0

 

1838

++

Titanium Tetrachloride

7553-56-2

   Iodine (Please see Radionuclides - Including Radon.)

1175

 

(7631-86-9)

 Crystalline Silica (respirable)

7647-01-0

 

1050/1789

*

Hydrochloric Acid

7664-38-2

 

1805

 Phosphoric Acid

7664-39-3

 

1052/1790

*

Hydrogen Fluoride (Hydrofluoric Acid)

7664-41-7

 

1005/2073/2672

 Ammonia

7664-93-9

 

1830/1831/1832

 Sulfuric Acid

7697-37-2

 

1760/2031/2032

 Nitric Acid

7723-14-0

 

1381

*

Phosphorus

7726-95-6

 

1744

 Bromine Compounds (Inorganic)

7758-01-2

   Potassium Bromate
(Please see Bromine Compounds - Inorganic.)

7758-98-7

   Copper Sulfate (Please see Copper Compounds.)

7782-49-2

 

2658

*

Selenium Compounds

7782-50-5

 

1017

*

Chlorine

7783-06-4

 

1053

 Hydrogen Sulfide

7783-07-5

   Htydrogen Selenide

7783-20-2

 

2506

++

Ammonium Sulfate

7784-42-1

 

2188

*

Arsine (Please see Arsenic and Compounds.)

7789-30-2

   Bromine Pentafluoride

7803-51-2

 

2199

*

Phosphine

8001-35-2

 

2761

 Toxaphene (Chlorinated Camphene)

8001-58-9

 

1136

++Creosotes, Coal Tar (Please see Creosotes.)

8014-95-7

   Oleum

8018-01-7

   Mancozeb (Please see Manganese Compounds.)

8021-39-4

   Creosotes, Wood (Please see Creosotes.)

10035-10-6

   Hydrogen bromide

10043-01-3

 

1760/9078

++Aluminum Sulfate (Please see Aluminum and Compounds.)

10043-92-2

   Radon (Please see Radionuclides - Including Radon)

10049-04-4

   Chlorine Dioxide

10124-36-4

   Cadmium Sulfate
(Please see Cadmium and Cadmium Compounds.)

13463-39-3

 

1259

 Nickel Carbonyl (Please see Nickel and Compounds.)

13510-49-1

   Beryllium Sulfate(Please see Beryllium Compounds.)

14464-46-1

   Cristobalite (Please see Crystalline Silica.)

14808-60-7

   Quartz (Please see Crystalline Silica.)

15468-32-3

   Tridymite (Please see Crystalline Silica.)

18540-29-9

  

*

Chromium VI (Please see Chromium and Compounds.)

19408-74-3

  

*

1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin

35822-46-9

  

*

1,2,3,4,6,7,8-Heptachlorodibenzo-p-Dioxin

39001-02-0

  

*

1,2,3,4,6,7,8,9-Octachlorodibenzofuran

39227-28-6

  

*

1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin

40321-76-4

  

*

1,2,3,7,8-Pentachlorodibenzo-p-Dioxin

55673-89-7

  

*

1,2,3,4,7,8,9-Heptachlorodibenzofuran

57117-31-4

  

*

2,3,4,7,8-Pentachlorodibenzofuran

57117-41-6

  

*

1,2,3,7,8-Pentachlorodibenzofuran

57117-44-9

  

*

1,2,3,6,7,8-Hexachlorodibenzofuran

57653-85-7

  

*

1,2,3,6,7,8-Hexachlorodibenzofuran

60851-34-5

  

*

2,3,4,6,7,8-Hexachlorodibenzofuran

67562-39-4

  

*

1,2,3,4,6,7,8-Heptachlorodibenzofuran

70648-26-9

  

*

1,2,3,4,7,8-Hexachlorodibenzofuran

72918-21-9

  

*

1,2,3,7,8,9-Hexachlorodibenzofuran

20859-73-8

   Aluminum Phosphide
(Please see Aluminum and Compounds.)

22967-92-6

   Methyl Mercury (Please see Mercury Compounds.)

25167-83-3

   Tetrachlorophenols

25551-13-7

   Trimethylbenzenes

26471-62-5

   Toluene diisocyanates

31508-00-6

   2,3',4,4',5-Pentachlorobiphenyl (PCB118)

32598-13-3

   3,3',4,4'-Tetrachlorobiphenyl (PCB 77)

32598-14-4

   2,3,3',4,4'-Pentachlorobiphenyl (PCB 105)

32774-16-6

   3,3',4,4',5,5'-Hexachlorobiphenyl (PCB 169)

38380-08-4

   2,3,3',4,4',5-Hexachlorobiphenyl (PCB 156)

39635-31-9

   2,3,3',4,4',5,5'-Heptachlorobiphenyl (PCB 189)

52663-72-6

   2,3',4,4',5,5'-Hexachlorobiphenyl (PCB 167)

57465-28-8

   3,3',4,4',5-Pentachlorobiphenyl (PCB 126)

57835-92-4

  

*

4-Nitropyrene

65510-44-3

   2,3',4,4',5'-Pentachlorobiphenyl (PCB 123)

69782-90-7

   2,3,3',4,4',5'-Hexachlorobiphenyl (PCB 157)

70362-50-4

   3,4,4',5-Tetrachlorobiphenyl (PCB81)

74472-37-0

   2,3,4,4',5-Pentachlorobiphenyl (PCB 114)

N/A

  

*

Chlorinated Dibenzofurans (Please see Chlorinated Dioxins.)

N/A

  

*

Chlorinated Dioxins
   1060 Chlorophenols
   1066 Coke Oven Emissions
   1070 Creosotes
   1075 Dialkylnitrosamines
   1078 Diaminotoluene (Mixed Isomers)
   1090 Environmental Tobacco Smoke
   1135 Fine Mineral Fibers
   1110 Gasoline Vapors

N/A

   Glycol Ethers

N/A

  

*

Inorganic Arsenic (Please see Arsenic and Compounds.)
   1128

*

Inorganic Lead (Please see Lead and Compounds.)
   1165 Radionuclides (Including Radon)
  2222 Polybrominated diphenylethers (PBDEs)
  9901

*

Diesel Exhaust Particulate Matter (Diesel PM)
    Polycyclic Organic Matter (POM)

+

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.

Toxic Air Contaminant (TAC) Indentification Program