# Appe ndix A: Hot Spots Unit Risk and Cancer Potency Values

Footnotes Source Key A see Appendix C BaP see benzo[ a ]pyrene TAC document C see Appendix E D Listed by ARB as “Particulate Matter from Diesel - Fueled Engines”; Scientific Review Panel unit risk “re asonable estimate” = 3.0 E - 4 (μg/m 3 ) - 1 . Range of unit risks in TAC document was 1.3 E - 4

– 2.4 E - 3 (μg/m 3 ) - 1 . N1 Nickel refinery dust and nickel subsulfide are in Class A; nickel carbonyl is in Class B2 N2 Nickel compounds are in Class 1; metallic nickel is in Class 2B NA not available NC not classified # [100 PCM fibers/m3] - 1 ; see Appendix F * can be calculated using PEF factors contained in the benzo[ a ]pyrene et al. TAC document P See PCB summary for risk categorization and TEF factors (Appendix C) than four chlorines do not comprise less than one - half percent of total PCBs TAC Toxic Air Contaminant document,

Office of Environmental Health Hazard Assessment (OEHHA) RCHAS - S Standard Proposition 65 document,

OEHHA IRIS Integrated Risk Info rmation System,

U.S. Environmental Protection Agency (US EPA) RCHAS - E Expedited Proposition 65 document,

OEHHA ATES Air Toxicology and Epidemiology

Section document, OEHHA PETS Pesticide and Environmental

Toxicology Section Public Health Goal document, O EHHA 

## A - 1 Chemical Chemical Abstract Service (CAS) Number Source Unit Risk (μg/m 3 ) - 1 Slope Factor

(mg/kg - day) - 1 US EPA

Class C IARC

Class C Acetaldehyde 75 - 07 - 0 TAC 2.7 E - 6 1.0 E - 2 B2 2B Acetamide 60 - 35 - 5 RCHAS - E 2.0 E - 5 7.0 E - 2 NC 2B Acrylamide 79 - 06 - 1 IRIS 1.3 E - 3 4.5 E+0 B2 2A Acrylonitrile 107 - 13 - 1 RCHAS - S 2.9 E - 4 1 .0 E+0 B1 2A Allyl chloride 107 - 05 - 1 RCHAS - S 6.0 E - 6 2.1 E - 2 C 3 2 - Aminoanthraquinone 117 - 79 - 3 RCHAS - E 9.4 E - 6 3.3 E - 2 NC 3 Aniline 62 - 53 - 3 IRIS 1.6 E - 6 5.7 E - 3 B2 3 Arsenic (inorganic) (inhalat ion) 7440 - 38 - 2 TAC 3.3 E - 3 1.2 E+1 A 1 (oral) IRIS 1.5 E+0 Asbestos 1332 - 21 - 4 TAC 6.3 E - 2 2.2 E+2 A 1 1.9 E - 4 # Benz[ a ]anthracene BaP (inhalation) 56 - 55 - 3 TAC 1.1 E - 4 3.9 E - 1 B2 2A (oral) 1.2 E+0 Benzene 71 - 43 - 2 TAC 2.9 E - 5 1.0 E - 1 A 1 Benzidine 92 - 87 - 5 RCHAS - S 1.4 E - 1 5.0 E+2 A 1 Benzo[ a ]pyrene (inhalation) 50 - 32 - 8 TAC 1.1 E - 3 3.9 E+0 B2 2A (oral) 1.2 E+1 Benzo[ b ]fluoranthrene BaP (inhalation) 205 - 99 - 2 TAC 1.1 E - 4 3.9 E - 1 B2 2B (oral) 1.2 E+0 Benzo[ j ]fluoranthrene BaP ( inhalation) 205 - 82 - 3 TAC 1.1 E - 4 3.9 E - 1 NC 2B (oral) 1.2 E+0 Benzo[ k ]fluoranthrene BaP (inhalation) 207 - 08 - 9 TAC 1.1 E - 4 3.9 E - 1 B2 2B (oral) 1.2 E+0 Benzyl chloride 100 - 44 - 7 IRIS 4.9 E - 5 1.7 E - 1 B2 2B Beryllium 7440 - 41 - 7 IRIS 2.4 E - 3 8.4 E+0 B2 1 Bis(2 - chloroethyl) ether 111 - 44 - 4 RCHAS - S 7.1 E - 4 2.5 E+0 B2 3 Bis(chloromethyl)ether 542 - 88 - 1 RCHAS - S 1.3 E - 2 4.6 E+1 A 1 1,3 - Butadiene 106 - 99 - 0 TAC 1.7 E - 4 6.0 E - 1 B2 2A Cadmium (and compounds) 7440 - 43 - 9 TAC 4.2 E - 3 1.5 E+1 B1 1 Carbon tet rachloride 56 - 23 - 5 TAC 4.2 E - 5 1.5 E - 1 B2 2B Chlorinated dibenzo -

p - dioxins A 1746 - 01 - 6 TAC B2 2B 2,3,7,8 - Tetrachlorodibenzo - p - dioxin 3.8 E+1 1.3 E+5 1,2,3,7,8 - Pentachlorodibenzo - p - dioxin 3.8 E+1 1.3 E+5 1,2,3,4,7,8 - Hexachlorodibenzo - p - dioxin 3.8 E+0 1.3 E+4 1,2,3,6,7,8 - Hexachlorodibenzo - p - dioxin 3.8 E+0 1.3 E+4 1,2,3,7,8,9 - Hexachlorodibenzo - p - dioxin 3.8 E+0 1.3 E+4

# Appe ndix A: Hot Spots Unit Risk and Cancer Potency Values

Footnotes Source Key A see Appendix C BaP see benzo[ a ]pyrene TAC document C see Appendix E D Listed by ARB as “Particulate Matter from Diesel - Fueled Engines”; Scientific Review Panel unit risk “re asonable estimate” = 3.0 E - 4 (μg/m 3 ) - 1 . Range of unit risks in TAC document was 1.3 E - 4

– 2.4 E - 3 (μg/m 3 ) - 1 . N1 Nickel refinery dust and nickel subsulfide are in Class A; nickel carbonyl is in Class B2 N2 Nickel compounds are in Class 1; metallic nickel is in Class 2B NA not available NC not classified # [100 PCM fibers/m3] - 1 ; see Appendix F * can be calculated using PEF factors contained in the benzo[ a ]pyrene et al. TAC document P See PCB summary for risk categorization and TEF factors (Appendix C) than four chlorines do not comprise less than one - half percent of total PCBs TAC Toxic Air Contaminant document,

Office of Environmental Health Hazard Assessment (OEHHA) RCHAS - S Standard Proposition 65 document,

OEHHA IRIS Integrated Risk Info rmation System,

U.S. Environmental Protection Agency (US EPA) RCHAS - E Expedited Proposition 65 document,

OEHHA ATES Air Toxicology and Epidemiology

Section document, OEHHA PETS Pesticide and Environmental

Toxicology Section Public Health Goal document, O EHHA 

## A - 2 Chemical Chemical Abstract Service (CAS) Number Source Unit Risk (μg/m 3 ) - 1 Slope Factor

(mg/kg - day) - 1 US EPA

Class C IARC

Class C 1,2,3,4,6,7,8 - Heptachlorodibenzo - p - dioxin 3.8 E - 1 1.3 E+3 1,2,3,4,5,6,7,8 - Octachlorodibenzo - p - dioxin 3.8 E - 3 1.3 E+1 Chlorinated dibenzofurans A 5120 - 73 - 19 TAC B2 NC 2,3,7,8 - Tetrachlorodibenzofuran 3.8 E+0 1.3 E+4 1,2,3,7,8 - Pentachlorodibenzofuran 1.9 E+0 6.5 E+3 2,3,4,7,8 - Pentachlorodibenzofuran 1.9 E+1 6.5 E+4 1,2,3,4,7,8 - Hexachlorodibenzofuran 3.8 E+0 1.3 E+4 1,2,3,6,7,8 - Hexachlorodibenzofuran 3.8 E+0 1.3 E+4 1,2,3,7,8,9 - Hexachlorodibenzofuran 3.8 E+0 1.3 E+4 2,3,4,6,7,8 - Hexachlorodibenzofuran 3.8 E+0 1.3 E+4 1,2,3,4,6,7,8 - Heptachlorodibenzofuran 3.8 E - 1 1.3 E+3 1,2,3,4,7,8,9 - Heptachlorodibenzofuran 3.8 E - 1 1.3 E+3 1,2,3,4,5,6,7,8 - Octachlorodibenzofuran 3.8 E - 3 1.3 E+1 Chlorinate d paraffins 108171 - 26 - 2 RCHAS - E 2.5 E - 5 8.9 E - 2 NC 2B Chloroform 67 - 66 - 3 TAC 5.3 E - 6 1.9 E - 2 B2 2B 4 - Chloro - o - phenylenediamine 95 - 83 - 0 RCHAS - E 4.6 E - 6 1.6 E - 2 NC 2B p - Chloro - o - toluidine 95 - 69 - 2 RCHAS - E 7.7 E - 5 2.7 E - 1 NC 2A Chromium (hexavalent) (inhal ation) 18540 - 29 - 9 TAC 1.5 E - 1 5.1 E+2 A 1 (oral) RCHAS - S 4.2 E - 1 Chrysene BaP (inhalation) 218 - 01 - 9 TAC 1.1 E - 5 3.9 E - 2 B2 3 (oral) 1.2 E - 1 Creosote 8001 - 58 - 9 ATES * * B1 2A p - Cresidine 120 - 71 - 8 RCHAS - E 4.3 E - 5 1.5 E - 1 NC 2B Cupferron 135 - 2 0 - 6 RCHAS - E 6.3 E - 5 2.2 E - 1 NC NC 2,4 - Diaminoanisole 615 - 05 - 4 RCHAS - E 6.6 E - 6 2.3 E - 2 NC 2B 2,4 - Diaminotoluene 95 - 80 - 7 RCHAS - E 1.1 E - 3 4.0 E+0 NC 2B Dibenz[ a,h ]acridine BaP (inhalation) 226 - 36 - 8 TAC 1.1 E - 4 3.9 E - 1 NC 2B (oral) 1.2 E+0 Dibenz[ a,j ]acridine BaP (inhalation) 224 - 42 - 0 TAC 1.1 E - 4 3.9 E - 1 NC 2B (oral) 1.2 E+0 Dibenz[ a,h ]anthracene BaP 53 - 70 - 3 RCHAS - E 1.2 E - 3 4.1 E+0 B2 2A Dibenzo[ a,e ]pyrene BaP (inhalation) 192 - 65 - 4 TAC 1.1 E - 3 3.9 E+0 NC 2B (oral) 1.2 E+1 Dibenzo[ a,h ] pyrene BaP (inhalation) 189 - 64 - 0 TAC 1.1 E - 2 3.9 E+1 NC 2B (oral) 1.2 E+2

# Appe ndix A: Hot Spots Unit Risk and Cancer Potency Values

Footnotes Source Key A see Appendix C BaP see benzo[ a ]pyrene TAC document C see Appendix E D Listed by ARB as “Particulate Matter from Diesel - Fueled Engines”; Scientific Review Panel unit risk “re asonable estimate” = 3.0 E - 4 (μg/m 3 ) - 1 . Range of unit risks in TAC document was 1.3 E - 4

– 2.4 E - 3 (μg/m 3 ) - 1 . N1 Nickel refinery dust and nickel subsulfide are in Class A; nickel carbonyl is in Class B2 N2 Nickel compounds are in Class 1; metallic nickel is in Class 2B NA not available NC not classified # [100 PCM fibers/m3] - 1 ; see Appendix F * can be calculated using PEF factors contained in the benzo[ a ]pyrene et al. TAC document P See PCB summary for risk categorization and TEF factors (Appendix C) than four chlorines do not comprise less than one - half percent of total PCBs TAC Toxic Air Contaminant document,

Office of Environmental Health Hazard Assessment (OEHHA) RCHAS - S Standard Proposition 65 document,

OEHHA IRIS Integrated Risk Info rmation System,

U.S. Environmental Protection Agency (US EPA) RCHAS - E Expedited Proposition 65 document,

OEHHA ATES Air Toxicology and Epidemiology

Section document, OEHHA PETS Pesticide and Environmental

Toxicology Section Public Health Goal document, O EHHA 

## A - 3 Chemical Chemical Abstract Service (CAS) Number Source Unit Risk (μg/m 3 ) - 1 Slope Factor

(mg/kg - day) - 1 US EPA

Class C IARC

Class C Dibenzo[ a,i ]pyrene BaP (inhalation) 189 - 55 - 9 TAC 1.1 E - 2 3.9 E+1 NC 2B (oral) 1.2 E+2 Dibenzo[ a,l ]pyrene BaP (inhalation) 191 - 30 - 0 TAC 1.1 E - 2 3.9 E+1 NC 2B (oral) 1.2 E+2 7H - Dibenzo[ c,g ]carbazole BaP (inhalation) 194 - 59 - 2 TAC 1.1 E - 3 3.9 E+0 NC 2B (oral) 1.2 E+1 1,2 - Dibromo - 3 - c hloropropane 96 - 12 - 8 RCHAS - S 2.0 E - 3 7.0 E+0 NC 2B 1,4 - Dichlorobenzene 106 - 46 - 7 RCHAS - S 1.1 E - 5 4.0 E - 2 NC 2B 3,3' - Dichlorobenzidine 91 - 94 - 1 RCHAS - S 3.4 E - 4 1.2 E+0 B2 2B 1,1 - Dichloroethane 75 - 34 - 3 RCHAS - E 1.6 E - 6 5.7 E - 3 C NC Diesel exhaust NA TAC 3.0 E - 4 D 1.1 E+0 NC 2A Diethylhexylphthalate 117 - 81 - 7 PETS 2.4 E - 6 8.4 E - 3 B2 2B p - Dimethylaminoazobenzene 60 - 11 - 7 RCHAS - E 1.3 E - 3 4.6 E+0 NC 2B 7,12 - Dimethylbenz[ a ]anthracene BaP 57 - 97 - 6 RCHAS - E 7.1 E - 2 2.5 E+2 NC NC 1,6 - Dinitropyrene BaP (inhalation) 4239 7 - 64 - 8 TAC 1.1 E - 2 3.9 E+1 NC 2B (oral) 1.2 E+2 1,8 - Dinitropyrene BaP (inhalation) 42397 - 65 - 9 TAC 1.1 E - 3 3.9 E+0 NC 2B (oral) 1.2 E+1 2,4 - Dinitrotoluene 121 - 14 - 2 RCHAS - S 8.9 E - 5 3.1 E - 1 NC 2B 1,4 - Dioxane 123 - 91 - 1 RCHAS - S 7.7 E - 6 2.7 E - 2 B2 2B Epichlorohydrin 106 - 89 - 8 RCHAS - S 2.3 E - 5 8.0 E - 2 B2 2A Ethyl benzene (inhalation) 100 - 41 - 4 TAC 2.5 E - 6 8.7 E - 3 D 2B (oral) 1.1 E - 2 Ethylene dibromide 106 - 93 - 4 TAC 7.1 E - 5 2.5 E - 1 B2 2A Ethylene dichloride 107 - 06 - 2 TAC 2.1 E - 5 7.2 E - 2 B2 2B Ethylene oxide 75 - 21 - 8 TAC 8.8 E - 5 3.1 E - 1 NC 1 Ethylene thiourea 96 - 45 - 7 RCHAS - E 1.3 E - 5 4.5 E - 2 UR 2B Formaldehyde 50 - 00 - 0 TAC 6.0 E - 6 2.1 E - 2 B1 2A Hexachlorobenzene 118 - 74 - 1 RCHAS - S 5.1 E - 4 1.8 E+0 B2 2B Hexachlorocyclohexanes (technical grade) 60 8 - 73 - 1 RCHAS - S 1.1 E - 3 4.0 E+0 B2 2B Hydrazine (inhalation) 302 - 01 - 2 IRIS 4.9 E - 3 1.7 E+1 B2 2B (oral) 3.0 E+0 Indeno[1,2,3 - cd ]pyrene BaP (inhalation) 193 - 39 - 5 TAC 1.1 E - 4 3.9 E - 1 B2 2B (oral) 1.2 E+0 Lead and lead compounds (inhalation) 74 39 - 92 - 1 TAC 1.2 E - 5 4.2 E - 2 B2 2B (oral) 8.5 E - 3 Lindane 58 - 89 - 9 RCHAS - S 3.1 E - 4 1.1 E+0 NC 2B

# Appe ndix A: Hot Spots Unit Risk and Cancer Potency Values

Footnotes Source Key A see Appendix C BaP see benzo[ a ]pyrene TAC document C see Appendix E D Listed by ARB as “Particulate Matter from Diesel - Fueled Engines”; Scientific Review Panel unit risk “re asonable estimate” = 3.0 E - 4 (μg/m 3 ) - 1 . Range of unit risks in TAC document was 1.3 E - 4

– 2.4 E - 3 (μg/m 3 ) - 1 . N1 Nickel refinery dust and nickel subsulfide are in Class A; nickel carbonyl is in Class B2 N2 Nickel compounds are in Class 1; metallic nickel is in Class 2B NA not available NC not classified # [100 PCM fibers/m3] - 1 ; see Appendix F * can be calculated using PEF factors contained in the benzo[ a ]pyrene et al. TAC document P See PCB summary for risk categorization and TEF factors (Appendix C) than four chlorines do not comprise less than one - half percent of total PCBs TAC Toxic Air Contaminant document,

Office of Environmental Health Hazard Assessment (OEHHA) RCHAS - S Standard Proposition 65 document,

OEHHA IRIS Integrated Risk Info rmation System,

U.S. Environmental Protection Agency (US EPA) RCHAS - E Expedited Proposition 65 document,

OEHHA ATES Air Toxicology and Epidemiology

Section document, OEHHA PETS Pesticide and Environmental

Toxicology Section Public Health Goal document, O EHHA 

## A - 4 Chemical Chemical Abstract Service (CAS) Number Source Unit Risk (μg/m 3 ) - 1 Slope Factor

(mg/kg - day) - 1 US EPA

Class C IARC

Class C Methyl tert - butyl et her (MTBE) 1634 - 04 - 4 TAC 2.6 E - 7 1.8 E - 3 NC 3 3 - Methylcholanthrene BaP 56 - 49 - 5 RCHAS - E 6.3 E - 3 2.2 E+1 NC NC 5 - Methylchrysene BaP (inhalation) 3697 - 24 - 3 TAC 1.1 E - 3 3.9 E+0 NC 2B (oral) 1.2 E+1 4, 4' - Methylene bis(2 - chloroaniline) (MOCA) 101 - 14 - 4 RCHAS - E 4.3 E - 4 1.5 E+0 NC 2A Methylene chloride 75 - 09 - 2 TAC 1.0 E - 6 3.5 E - 3 B2 2B 4,4' - Methylenedianiline 101 - 77 - 9 RCHAS - E 4.6 E - 4 1.6 E+0 NC 2B Michler's ketone 90 - 94 - 8 RCHAS - E 2.5 E - 4 8.6 E - 1 NC NC Naphthalene 91 - 20 - 3 TAC 3.4 E - 5 1.2 E - 1 NC 2B Ni ckel (and compounds) 7440 - 02 - 0 TAC 2.6 E - 4 9.1 E - 1 A, B2 N1 1,2B N2 5 - Nitroacenaphthene BaP 602 - 87 - 9 RCHAS - E 3.7 E - 5 1.3 E - 1 NC 2B 6 - Nitrochrysene BaP (inhalation) 7496 - 02 - 8 TAC 1.1 E - 2 3.9 E+1 NC 2B (oral) 1.2 E+2 2 - Nitrofluorene BaP (inhalation) 60 7 - 57 - 8 TAC 1.1 E - 5 3.9 E - 2 NC 2B (oral) 1.2 E - 1 1 - Nitropyrene BaP (inhalation) 5522 - 43 - 0 TAC 1.1 E - 4 3.9 E - 1 NC 2B (oral) 1.2 E+0 4 - Nitropyrene BaP (inhalation) 57835 - 92 - 4 TAC 1.1 E - 4 3.9 E - 1 NC 2B (oral) 1.2 E+0 N - Nitrosodi - n - butyla mine 924 - 16 - 3 RCHAS - S 3.1 E - 3 1.1 E+1 B2 2B N - Nitroso - N - methylethylamine 10595 - 95 - 6 IRIS 6.3 E - 3 2.2 E+1 B2 2B N - Nitrosodi - n - propylamine 621 - 64 - 7 IRIS 2.0 E - 3 7.0 E+0 B2 2B N - Nitrosodiethylamine 55 - 18 - 5 RCHAS - S 1.0 E - 2 3.6 E+1 B2 2A N - Nitrosodimethylam ine 62 - 75 - 9 RCHAS - S 4.6 E - 3 1.6 E+1 B2 2A N - Nitrosodiphenylamine 86 - 30 - 6 RCHAS - S 2.6 E - 6 9.0 E - 3 B2 3 p - Nitrosodiphenylamine 156 - 10 - 5 RCHAS - E 6.3 E - 6 2.2 E - 2 NC 3 N - Nitrosomorpholine 59 - 89 - 2 RCHAS - E 1.9 E - 3 6.7 E+0 NC 2B N - Nitrosopiperidine 100 - 75 - 4 RC HAS - E 2.7 E - 3 9.4 E+0 NC 2B N - Nitrosopyrrolidine 930 - 55 - 2 IRIS 6.0 E - 4 2.1 E+0 B2 2B Pentachlorophenol 87 - 86 - 5 RCHAS - S 5.1 E - 6 1.8 E - 2 B2 2B Perchloroethylene (inhalation) 127 - 18 - 4 TAC 5.9 E - 6 2.1 E - 2 NC 2A (oral) RCHAS - S 5.1 E - 2 Polychlorinated biphenyls (PCBs) (high risk) P 1336 - 36 - 3 IRIS 5.7 E - 4 2.0 E+0 B2 2A (for use with unspeciated (low risk) P 1.1 E - 4 4.0 E - 1 PCB mixtures) (low risk) P 1.1 E - 4 4.0 E - 1 (lowest risk) P 2.0 E - 5 7.0 E - 2

# Appendix A: Hot Spots Unit Risk and Cancer Potency Values

Footnotes Source Key A see Appendix E BaP see benzo[ a ]pyrene TAC document C see Appendix C D Listed by ARB as “Particulate Matter from Diesel - Fueled En gines”; Scientific Review Panel unit risk “reasonable estimate” = 3.0 E - 4 (μg/m 3 ) - 1 . Range of unit risks in TAC document was 1.3 E - 4

– 2.4 E - 3 (μg/m 3 ) - 1 . N1 Nickel refinery dust and nickel subsulfide are in Class A; nickel carbonyl is in Class B2 N2 N ickel compounds are in Class 1; metallic nickel is in Class 2B NA not available NC not classified # [100 PCM fibers/m3] - 1 ; see Appendix D * can be calculated using PEF factors contained in the benzo[ a ]pyrene et al. TAC document P See chemical summary for risk categorization and TEF factors, Appendix C than four chlorines do not comprise less than one - half percent of total PCBs TAC Toxic Air Contaminant document,

Office of Environmental Health Hazard Assessment (OEHHA) RCHAS - S Standard Propo sition 65 document,

OEHHA IRIS Integrated Risk Information System,

U.S. Environmental Protection Agency (US EPA) RCHAS - E Expedited Proposition 65 document,

OEHHA ATES Air Toxicology and Epidemiology

Section document, OEHHA PETS Pesticide and Environment al

Toxicology Section Public Health Goal document, OEHHA 

## A - 5 Chemical Chemical Abstract Service (CAS) N umber Source Unit Risk (μg/m 3 ) - 1 Slope Factor

(mg/kg - day) - 1 US EPA

Class C IARC

Class C (for use where measurements or estimates are available for PCB congeners) P PCB 77 3,3',4,4' - TCB 3.8 E - 3 1.3 E+1 PCB 81 3,4,4',5 - TCB 3.8 E - 3 1.3 E+1 P CB 105 2,3,3',4,4' - PeCB 3.8 E - 3 1.3 E+1 PCB 114 2,3,4,4',5 - PeCB 1.9 E - 2 6.5 E+1 PCB 118 2,3',4,4',5 - PeCB 3.8 E - 3 1.3 E+1 PCB 123 2',3,4,4',5 - PeCB 3.8 E - 3 1.3 E+1 PCB 126 3,3',4,4',5 - PeCB 3.8 E+0 1.3 E+4 PCB 156 2,3,3',4,4',5 - HxCB 1.9 E - 2 6.5 E+1 PCB 157 2,3,3',4,4',5' - HxCB 1.9 E - 2 6.5 E+1 PCB 167 2,3',4,4',5,5' - HxCB 3.8 E - 4 1.3 E+0 PCB 169 3,3',4,4',5,5' - HxCB 3.8 E - 1 1.3 E+3 PCB 189 2,3,3',4,4',5,5' - HpCB 3.8 E - 3 1.3 E+1 Potassium bromate 7758 - 01 - 2 RCHAS - E 1.4 E - 4 4.9 E - 1 NC 2B 1,3 - Propane sultone 1120 - 71 - 4 RCHAS - E 6.9 E - 4 2.4 E+0 NC 2B Propylene oxide (inhalation) 75 - 56 - 9 IRIS 3.7 E - 6 1.3 E - 2 B2 2B (oral) 2.4 E - 1 1,1,2,2 - Tetrachloroethane 79 - 34 - 5 IRIS 5.8 E - 5 2.0 E - 1 C 3 Thioacetamide 62 - 55 - 5 RCHAS - E 1.7 E - 3 6.1 E+0 NC 2B 2,4 - Toluene diisocyanate 584 - 84 - 9 RCHAS - E 1.1 E - 5 3.9 E - 2 NC 2B 2,6 - Toluene diisocyanate 91 - 08 - 7 RCHAS - E 1.1 E - 5 3.9 E - 2 NC 2B 1,1,2 - Trichloroethane (vinyl trichloride) 79 - 00 - 5 IRIS 1.6 E - 5 5.7 E - 2 C 3 Trichloroethyl ene (inhalation) 79 - 01 - 6 TAC 2.0 E - 6 7.0 E - 3 NC 2A (oral) RCHAS - S 1.5 E - 2 2,4,6 - Trichlorophenol 88 - 06 - 2 RCHAS - S 2.0 E - 5 7.0 E - 2 B2 2B Urethane 51 - 79 - 6 RCHAS - S 2.9 E - 4 1.0 E+0 NC 2B Vinyl chloride 75 - 01 - 4 TAC 7.8 E - 5 2.7 E - 1 NC 1