ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Acetaldehyde 75-07-0 1 81 i 81 i 490 i 200 i 18 360 

Acetamide 60-35-5 2 Acetonitrile 75-05-8 3 22 i 22 i 540 i 140 i 

Acetophenone 98-86-2 4 2-Acetylaminofluorene 53-96-3 5 Acrolein 107-02-8 6 0.069 f 0.069 f 0.23 f 0.23 f 0.11 0.34 0.0069 0Acrylamide 79-06-1 7 Acrylic acid 79-10-7 8 4.4 i 4.4 i 140 i 41 i 2.9 150 

Acrylonitrile 107-13-1 9 10 i 10 i 120 i 19 i 22 77 0.22 

Allyl chloride 107-05-1 10 8.8 i 8.8 i 170 i 69 i 9.4 130 

4-Aminobiphenyl 92-67-1 11 Aniline 62-53-3 12 30 f 3.8 f 46 f 5.7 f 

Anisidine 90-04-0 13 Antimony compounds 7440-36-0 173 Antimony pentafluoride 7783-70-2 173 Antimony potassium tartrate 304-61-0 173 Antimony trihydride 7803-52-3 173 i 7.7 i 0.92 i

Antimony trioxide 1309-64-4 173 Arsenic chloride 7784-34-1 174 Arsenic compounds 7440-38-2 174 0Arsenic oxide 1327-53-3 174 i 3 i 1.2 iArsenic pentoxide 1303-28-2 174 Arsine 7784-42-1 174 f 0.54 f 0.064 f 1.6 

Benzene 71-43-2 15 170 i 29 i 2600 i 640 i 160 480 0.029 

Benzidine 92-87-5 16 Benzotrichloride 98-07-7 17 Benzyl chloride 100-44-7 18 5.2 52 Beryllium chloride 7787-47-5 175 Beryllium compounds 7440-41-7 175 0.025 Beryllium fluoride 7787-49-7 175 Beryllium nitrate 13597-99-4 175 Beryllium oxide 1304-56-9 175 Biphenyl 92-52-4 19 i 61 i 28 i

Bis(2-ethylhexyl)phthalate 117-81-7 20 Bis(chloromethyl)ether 542-88-1 21 i 0.21 i 0.094 i 0.47

Bromoform 75-25-2 22 1,3-Butadiene 106-99-0 23 1500 i 1500 i 12000 i 6000 i 22 440 0.22 Cadmium compounds 7440-43-9 176 0.00003 Cadmium oxide 1306-19-0 176 Cadmium stearate 2223-93-0 176 Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

Page 1 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

Calcium cyanamide 156-62-7 24 Captan 133-06-2 26 Carbaryl 63-25-2 27 Carbon disulfide 75-15-0 28 40 f 21 f 500 f 160 f 3.1 160 

Carbon tetrachloride 56-23-5 29 280 i 120 i 1200 i 510 i 130 630 

Carbonyl sulfide 463-58-1 30 i 140 i 57 i

Catechol 120-80-9 31 Chloramben 133-90-4 32 Chlordane 57-74-9 33 Chlorine 7782-50-5 34 1.5 f 1.5 f 5.8 f 2.1 f 2.9 8.7 0.2 

Chloroacetic acid 79-11-8 35 f 26 f 3.2 f

2-Chloroacetophenone 532-27-4 36Chlorobenzene 108-90-7 37 46 i 46 i 690 i 690 i 

Chlorobenzilate 510-15-6 38 Chloroform 67-66-3 39 i 310 i 140 i 240 0.49 

Chloromethyl methyl ether 107-30-2 40 i 1.6 i 0.73 i 3.3

Chloroprene 126-99-8 41 Chromium (III) compounds 16065-83-1 177Chromium (VI) compounds 18540-29-9 177 Chromium (VI) trioxide, chromic acid mist 11115-74-5 177 Chromium chloride 10025-73-7 177 Chromium compounds 7440-47-3 177 Cobalt bromide 7789-43-7 178 Cobalt carbonate 513-79-1 178 Cobalt carbonyl 10210-68-1 178 Cobalt chloride 7646-79-9 178 Cobalt compounds 7440-48-4 178 Cobalt hydrocarbonyl 16842-03-8 178 0.9Cobalt nitrate Co Nitrate 178 Cobalt oxides (mixed) COBOXIDES 178 Coke Oven Emissions 8007-45-2 179 m-Cresol 108-39-4 44 o-Cresol 95-48-7 43 p-Cresol 106-44-5 45 Cresols (mixed) 1319-77-3 42 Cumene 98-82-8 46 250 i 250 i 1500 i 640 i 

Cyanophos 2636-26-2 180 Cyanuric fluoride 675-14-9 180 Cyanide compounds 57-12-5 180 Acetone cyanohydrin 75-86-5 180 7 f 3.5 f 25 f 8.7 f

Page 2 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

Barium cyanide 542-62-1 180 Calcium cyanide 592-01-8 180 3.8 i 1.9 i 13 i 4.7 iCopper cyanide 544-92-3 180 Cyanogen 460-19-5 180 4.3 i 2.1 i 18 i 9.2 iCyanogen bromide 506-68-3 180 Cyanogen chloride 506-77-4 180 1Cyanogen iodide 506-78-5 180 Hydrogen cyanide 74-90-8 180 2.2 f 1.1 f 7.8 f 2.8 f 11 

Isopropyl cyanide 78-82-0 180 51 i 21 i 28 140

Potassium cyanide 151-50-8 180 Potassium silver cyanide 506-61-6 180 Potassium thiocyanate 333-20-0 180 Silver cyanide 506-64-9 180 Sodium cyanide 143-33-9 180 Zinc cyanide 557-21-1 180 2,4-D, salts and esters 94-75-7 47 DDE 72-55-9 48 Diazomethane 334-88-3 49 Dibenzofuran 132-64-9 50 2,3,4,7,8-Pentachlorodibenzofuran 57117-31-4 187 1,2-Dibromo-3-chloropropane 96-12-8 51 Dibutylphthalate 84-74-2 52 p-Dichlorobenzene 106-46-7 53 12 3,3'-Dichlorobenzidine 91-94-1 54 Dichloroethyl ether 111-44-4 55 1,3-Dichloropropene 542-75-6 56 Dichlorvos 62-73-7 57 0.99 p 0.99 p 5.1 p 5.1 p 0.018 

Diesel engine emissions EMIS. 999 Diethanolamine 111-42-2 58 Diethyl sulfate 64-67-5 60 N,N-diethyl/dimethylaniline Dialks 593,3'-Dimethoxybenzidine 119-90-4 61 p-Dimethylaminoazobenzene 60-11-7 62 3,3'-Dimethylbenzidine 119-93-7 63 Dimethyl carbamoyl chloride 79-44-7 64 Dimethyl formamide 68-12-2 65 i 270 i 110 i 6 300 

Dimethyl phthalate 131-11-3 67 Dimethyl sulfate 77-78-1 68 0.12 i 0.045 i 0.62 i 0.22 i 

N,N-dimethylaniline 121-69-7 59 1,1-Dimethylhydrazine 57-14-7 66 f 7.4 f 0.93 f 

Page 3 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

4,6-Dinitro-o-cresol 534-52-1 69 2,4-dinitrophenol 51-28-5 70 2,4-Dinitrotoluene 121-14-2 71 2,4/2,6-Dinitrotoluene (mixture) 25321-14-6 71 1,4-Dioxane 123-91-1 72 61 i 61 i 1200 i 360 i 7.2 

1,2-Diphenylhydrazine 122-66-7 73 Epichlorohydrin 106-89-8 74 22 i 22 i 91 i 38 i 19 76 

1,2-Epoxybutane 106-88-7 75 210 i 210 i 410 i 410 i

Ethyl acrylate 140-88-5 76 34 i 34 i 150 i 38 i 0.041 120 

Ethyl benzene 100-41-4 77 140 i 140 i 4800 i 2500 i 22 

Ethyl carbamate 51-79-6 78 Ethyl chloride 75-00-3 79 40 Ethylene dibromide 106-93-4 80 130 i 35 i 180 i 50 i 

Ethylene dichloride 107-06-2 81 200 810 Ethylene glycol 107-21-1 82 2Ethylene imine (Aziridine) 151-56-4 83 f 8.1 f 0.83 f

Ethylene oxide 75-21-8 84 f 81 f 14 f 90 

Ethylene thiourea 96-45-7 85 Ethylidene dichloride (1,1-Dichloroethane) 75-34-3 86 Formaldehyde 50-00-0 87 1.1 f 1.1 f 17 f 17 f 1.2 12 0.049 

Diethylene glycol monobutyl ether 112-34-5 181 Diethylene glycol monoethyl ether 111-90-0 181 Ethylene glycol ethyl ether 110-80-5 181 Ethylene glycol ethyl ether acetate 111-15-9 181 Ethylene glycol methyl ether 109-86-4 181 Ethylene glycol methyl ether acetate 110-49-6 181Heptachlor 76-44-8 88 Hexachlorobenzene 118-74-1 89 Hexachlorobutadiene 87-68-3 90 11 32Hexachlorocyclopentadiene 77-47-4 91 Hexachlorodibenzo-p-dioxin, mixture 19408-74-3 187 Hexachloroethane 67-72-1 92 58Hexamethylene-1,6-diisocyanate 822-06-0 93 Hexamethylphosphoramide 680-31-9 94 n-Hexane 110-54-3 95 i 12000 i 12000 i 

Hydrazine 302-01-2 96 0.13 f 0.13 f 17 f 2.1 f 0.65 6.5 

Hydrochloric acid 7647-01-0 97 2.7 f 2.7 f 33 f 16 f 4.5 30 

Hydrofluoric acid 7664-39-3 98 0.82 f 0.82 f 20 f 9.8 f 1.6 16 0.016 Hydrogen sulfide 7783-06-4 999 0.71 i 0.46 i 38 i 24 i 0.14 42 0.098 

Hydroquinone 123-31-9 99 

Page 4 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

Isophorone 78-59-1 100 Lead acetate 301-04-2 182 Lead chloride 7758-95-4 182 Lead compounds 7439-92-1 182 Lead nitrate 10099-74-8 182 Lead subacetate 1335-32-6 182 Tetraethyl lead 78-00-2 182 Tetramethyl lead 75-74-1 182 Lindane (gamma-HCH) 58-89-9 101 alpha-Hexachlorocyclohexane (a-HCH) 319-84-6 101 beta-Hexachlorocyclohexane (b-HCH) 319-85-7 101 technical Hexachlorocyclohexane (HCH) 608-73-1 101 Maleic anhydride 108-31-6 102 0.8 8 Manganese chloride 7773-01-5 183 Manganese compounds 7439-96-5 183 Manganese dioxide 1313-13-9 183 Manganese oxide 1317-35-7 183 Manganese sulfate 7785-87-7 183 Manganese tricarbonyl methylcyclopentadienyl 12108-13-3 183 Mercuric acetate 1600-27-7 184 Mercuric chloride 7487-94-7 184 Mercuric nitrate 10045-94-0 184 Mercuric oxide 21908-53-2 184 Mercury (elemental) 7439-97-6 184 i 1.7 i 0.33 i 2 0

Methylmercuric dicyanamide 502-39-6 184 Mercury compounds HG_CMPDS 184 Methoxyethylmercuric acetate 151-38-2 184 Methyl mercury 22967-92-6 184 Phenylmercuric acetate 62-38-4 184 Methanol 67-56-1 103 690 i 350 i 2700 i 680 i 260 1300 Methoxychlor 72-43-5 104 Methyl bromide 74-83-9 105 i 820 i 260 i 190 0.19 

Methyl chloride 74-87-3 106 i 1900 i 780 i 830 1 Methyl chloroform (1,1,1-Trichloroethane) 71-55-6 107 1300 i 1300 i 3300 i 1700 i 1900 3800 11 

Methyl hydrazine 60-34-4 109 f 3.2 f 0.39 f 

Methyl iodide 74-88-4 110 150 290 Methyl isobutyl ketone 108-10-1 111 Methyl isocyanate 624-83-9 112 f 0.16 f 0.019 f 0.058 0.58 

Methyl methacrylate 80-62-6 113 70 i 70 i 490 i 200 i Methyl tert-butyl ether 1634-04-4 114 180 i 180 i 2100 i 1400 i 7.2

Page 5 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

4,4'-Methylene bis(2-chloroaniline) 101-14-4 115 Methylene chloride 75-09-2 116 690 i i 1900 i 210 i 1000 2600 2.1 

Methylene diphenyl diisocyanate 101-68-8 117 5 4,4'-Methylenedianiline 101-77-9 118 Naphthalene 91-20-3 119 Nickel acetate 373-02-4 186Nickel carbonyl 13463-39-3 186 f 0.25 f 0.031 f 

Nickel chloride 7718-54-9 186 Nickel compounds 7440-02-0 186 0Nickel nitrate 13138-45-9 186 Nickel oxide 1313-99-1 186 Nickel refinery dust NI_DUST 186Nickel subsulfide 12035-72-2 186Nickel sulfate 7786-81-4 186 Nitrobenzene 98-95-3 120 4-Nitrobiphenyl 92-93-3 121 4-Nitrophenol 100-02-7 122 2-Nitropropane 79-46-9 123 Nitrosodimethylamine 62-75-9 125 N-Nitrosomorpholine 59-89-2 126 N-Nitroso-N-methylurea 684-93-5 124 Parathion 56-38-2 127 i 1.5 i 0.48 i 

Polychlorinated biphenyls 1336-36-3 136 Aroclor 1016 12674-11-2 136 Aroclor 1221 11104-28-2 136 Aroclor 1242 53469-21-9 136 Aroclor 1248 12672-29-6 136 Aroclor 1254 11097-69-1 136 Aroclor 1260 11096-82-5 136 Pentachloronitrobenzene 82-68-8 128 Pentachlorophenol 87-86-5 129 Phenol 108-95-2 130 58 f 24 f 89 f 46 f 38 190 

p-Phenylenediamine 106-50-3 131 Phosgene 75-44-5 132 f 1.2 f 0.16 f 2.0 Phosphine 7803-51-2 133 f 2.8 f 0.35 f 0.7Phosphorus, white 7723-14-0 134 0.02Phthalic anhydride 85-44-9 135 Acenaphthene 83-32-9 187 Anthracene 120-12-7 187 Benzo(a)anthracene 56-55-3 187 

Page 6 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

Benzo(b)fluoranthene 205-99-2 187 Benzo(k)fluoranthene 207-08-9 187 Benzo(g,h,i)perylene 191-24-2 187 Benzo(a)pyrene 50-32-8 187 Carbazole 86-74-8 187 beta-Chloronaphthalene 91-58-7 187 Chrysene 218-01-9 187 Dibenz(a,h)anthracene 53-70-3 187 Dibenzo[a,e]pyrene 192-65-4 187 Fluoranthene 206-44-0 187 Fluorene 86-73-7 187 Indeno(1,2,3-cd)pyrene 193-39-5 187 3-Methylcholanthrene 56-49-5 187 1-Methylnaphthalene 90-12-0 187 2-Methylnaphthalene 91-57-6 187 2-Naphthylamine 91-59-8 187 1-Nitropyrene 5522-43-0 187 Phenanthrene 85-01-8 187 Pyrene 129-00-0 187 1,3-Propane sultone 1120-71-4 137 beta-Propiolactone 57-57-8 138 Propionaldehyde 123-38-6 139 110 i 110 i 620 i 260 iPropoxur 114-26-1 140 Propylene dichloride 78-87-5 141 0.23 Propylene oxide 75-56-9 142 170 f 170 f 690 f 200 f 120 590 

1,2-Propyleneimine 75-55-8 143 f 28 f 2.8 f

Quinoline 91-22-5 144 Quinone 106-51-4 145 Selenium compounds 7782-49-2 189 Hydrogen selenide 7783-07-5 189 i 2.4 i 0.86 i 0.66 

Potassium selenate 7790-59-2 189 Selenious acid 7783-00-8 189 Selenium dioxide 7446-08-4 189 Selenium disulfide 7488-56-4 189 Selenium oxychloride 7791-23-3 189 Selenium sulfide 7446-34-6 189 Sodium selenate 13410-01-0 189 Sodium selenite 10102-18-8 189 Styrene 100-42-5 146 85 i 85 i 550 i 550 i 210 1100 21 

Styrene oxide 96-09-3 147 

Page 7 of 8
ERPG-1 ERPG-2 MRL RE

CHEMICAL NAME CAS NO. HAP NO. mg/m3 mg/m3 mg/m3 mg

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effe

Superscripts indicate the AEGL's status: f = final, i=interim, and p=proposed. ERPG = US DOE Emergency Removal Program guidelines for mild or transient effects (ERPG-1) 

2) for 1-hour exposures. MRL = ATSDR minumum risk levels for no adverse effects for 1 to 14-day exposures. REL = California EPA reference exposure level for no adverse e

exposures. IDLH/10 = One-tenth of levels determined by NIOSH to be imminently dangerous to life and health, approximately comparable to mild effects levels for 1-hour exp

emergency exposure limits for no effects (TEEL-0) and mild, transient effects (TEEL-1) for 1-hour exposures. TEELs are derived according to a tiered, formula-like methodologyare not recommended as the basis for regulatory decision-making, and are shown here only to inform situations where acute values from other sources are not available.

Table 2. Acute Dose-Response Values for Screening Risk Assessments (5/9/2014) AEGL-2 (8-h)

mg/m3 mg/m3 mg/m3

AEGL-1 (1-h) AEGL-1 (8-h)

mg/m3

AEGL-2 (1-h)

2,3,7,8-Tetrachlorodibenzo-p-dioxin 1746-01-6 148 1,1,2,2-Tetrachloroethane 79-34-5 149 Tetrachloroethene 127-18-4 150 240 i 240 i 1600 i 550 i 680 1400 1.4 

Titanium tetrachloride 7550-45-0 151 0.54 i 0.54 i 7.8 i 0.73 i 5 20

Toluene 108-88-3 152 750 i 750 i 4500 i 2400 i 190 1100 3.8 

2,4-Toluene diamine 95-80-7 153 2,4/2,6-Toluene diisocyanate mixture (TDI) 26471-62-5 154 2,4-Toluene diisocyanate 584-84-9 154 0.14 f 0.071 f 0.59 f 0.15 f 0.071 1.1 

o-Toluidine 95-53-4 155 Toxaphene 8001-35-2 156 1,2,4-Trichlorobenzene 120-82-1 157 1,1,2-Trichloroethane 79-00-5 158 Trichloroethylene 79-01-6 159 700 i 410 i 2400 i 1300 i 540 2700 11

2,4,5-Trichlorophenol 95-95-4 160 2,4,6-Trichlorophenol 88-06-2 161 Triethylamine 121-44-8 162 Trifluralin 1582-09-8 163 2,2,4-trimethylpentane 540-84-1 164 Uranium compounds 7440-61-1 188 Uranium (IV) dioxide 1344-57-6 188 10Uranium hexafluoride 7783-81-5 188 3.6 f f 9.6 f 1.2 f 5 15

Uranium oxide 1344-59-8 188 10Uranium, soluble salts URANSOLS 188 Uranyl acetate dihydrate 541-09-3 188 Uranyl nitrate hexahydrate 13520-83-7 188 Vinyl acetate 108-05-4 165 24 i 24 i 630 i 260 i 18 260

Vinyl bromide 593-60-2 166 Vinyl chloride 75-01-4 167 640 i 180 i 3100 i 2100 i 1300 13000 1.3 

Vinylidene chloride 75-35-4 168 m-Xylene 108-38-3 171 o-Xylene 95-47-6 170 p-Xylene 106-42-3 172 Xylenes (mixed) 1330-20-7 169 560 i 560 i 4000 i 1700 i 8.7 

Page 8 of 8