ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Acetaldehyde 75-07-0 1 81 i81 i490 i200 i18 360 0.47 360

Acetamide 60-35-5 2 25 75

Acetonitrile 75-05-8 3 22 i22 i540 i140 i84

Acetophenone 98-86-2 4 10 30

2-Acetylaminofluorene 53-96-3 5 0.25 0.75

Acrolein 107-02-8 6 0.069 f0.069 f0.23 f0.23 f0.11 0.34 0.0069 0.0025 0.46

Acrylamide 79-06-1 7 6

Acrylic acid 79-10-7 8 4.4 i4.4 i140 i41 i2.9 150 6

Acrylonitrile 107-13-1 9 10 i10 i120 i19 i22 77 0.22 19

Allyl chloride 107-05-1 10 8.8 i8.8 i170 i69 i9.4 130 78

4-Aminobiphenyl 92-67-1 11 0.5 1.5

Aniline 62-53-3 12 30 f3.8 f46 f5.7 f38

Anisidine 90-04-0 13 5

Antimony compounds 7440-36-0 173 5

Antimony pentafluoride 7783-70-2 173 0.75 0.75

Antimony potassium tartrate 304-61-0 173 1.2 4

Antimony trihydride 7803-52-3 173 i7.7 i0.92 i

Antimony trioxide 1309-64-4 173 0.6 1.5

Arsenic chloride 7784-34-1 174 0.19 0.56

Arsenic compounds 7440-38-2 174 0.0002 0.5

Arsenic oxide 1327-53-3 174 i3

i

1.2 i

Arsenic pentoxide 1303-28-2 174 0.015 0.045

Arsine 7784-42-1 174 f0.54 f0.064 f1.6 0.96

Benzene 71-43-2 15 170 i29 i2600 i640 i160 480 0.029 1.3 160

Benzidine 92-87-5 16 0.15 0.5

Benzotrichloride 98-07-7 17 0.1 0.1

Benzyl chloride 100-44-7 18 5.2 52 0.24 5.2

Beryllium chloride 7787-47-5 175 0.015 0.04

Beryllium compounds 7440-41-7 175 0.025 0.4

Beryllium fluoride 7787-49-7 175 0.01 0.025

Beryllium nitrate 13597-99-4 175 0.03 0.075

Beryllium oxide 1304-56-9 175 0.005

Biphenyl 92-52-4 19 i61 i28 i

Bis(2-ethylhexyl)phthalate 117-81-7 20 5 10

Bis(chloromethyl)ether 542-88-1 21 i0.21 i0.094 i0.47

Bromoform 75-25-2 22 880

1,3-Butadiene 106-99-0 23 1500 i1500 i12000 i6000 i22 440 0.22 440

Cadmium compounds 7440-43-9 176 0.00003 0.9

Cadmium oxide 1306-19-0 176 0.005 0.035

Cadmium stearate 2223-93-0 176 0.03 0.15

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.5 1.5

Captan 133-06-2 26 5 15

Carbaryl 63-25-2 27 10

Carbon disulfide 75-15-0 28 40 f21 f500 f160 f3.1 160 6.2 160

Carbon tetrachloride 56-23-5 29 280 i120 i1200 i510 i130 630 1.9 130

Carbonyl sulfide 463-58-1 30 i140 i57 i

Catechol 120-80-9 31 23 68

Chloramben 133-90-4 32 35 100

Chlordane 57-74-9 33 10

Chlorine 7782-50-5 34 1.5 f1.5 f5.8 f2.1 f2.9 8.7 0.2 0.21 2.9

Chloroacetic acid 79-11-8 35 f26 f3.2 f

2-Chloroacetophenone 532-27-4 36

Chlorobenzene 108-90-7 37 46 i46 i690 i690 i460

Chlorobenzilate 510-15-6 38 0.075 0.25

Chloroform 67-66-3 39 i310 i140 i240 0.49 0.15 240

Chloromethyl methyl ether 107-30-2 40 i1.6 i0.73 i3.3

Chloroprene 126-99-8 41 110

Chromium (III) compounds 16065-83-1 177

Chromium (VI) compounds 18540-29-9 177 1.5

Chromium (VI) trioxide, chromic acid mist 11115-74-5 177 1.5

Chromium chloride 10025-73-7 177 1.5 4

Chromium compounds 7440-47-3 177 1 1.5

Cobalt bromide 7789-43-7 178 0.2 0.2

Cobalt carbonate 513-79-1 178 0.12 0.12

Cobalt carbonyl 10210-68-1 178 0.27 0.27

Cobalt chloride 7646-79-9 178 0.12 0.12

Cobalt compounds 7440-48-4 178 2

Cobalt hydrocarbonyl 16842-03-8 178 0.9

Cobalt nitrate Co Nitrate 178 0.15 0.15

Cobalt oxides (mixed) COBOXIDES 178 0.075 0.075

Coke Oven Emissions 8007-45-2 179 0.1 1.2

m-Cresol 108-39-4 44 110

o-Cresol 95-48-7 43 110

p-Cresol 106-44-5 45 110

Cresols (mixed) 1319-77-3 42 110

Cumene 98-82-8 46 250 i250 i1500 i640 i440

Cyanophos 2636-26-2 180 1.2 3.5

Cyanuric fluoride 675-14-9 180 0.17 0.17

Cyanide compounds 57-12-5 180 2.5

Acetone cyanohydrin 75-86-5 180 7

f

3.5 f25 f8.7 f

Page 2 of 8
ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.6 2

Calcium cyanide 592-01-8 180 3.8 i1.9 i13 i4.7 i

Copper cyanide 544-92-3 180 1.2 4

Cyanogen 460-19-5 180 4.3 i2.1 i18 i9.2 i

Cyanogen bromide 506-68-3 180 20 44

Cyanogen chloride 506-77-4 180 1

Cyanogen iodide 506-78-5 180 35 100

Hydrogen cyanide 74-90-8 180 2.2 f1.1 f7.8 f2.8 f11 0.34 5.5

Isopropyl cyanide 78-82-0 180 51 i21 i28 140

Potassium cyanide 151-50-8 180 5 5

Potassium silver cyanide 506-61-6 180 1 3

Potassium thiocyanate 333-20-0 180 10 35

Silver cyanide 506-64-9 180 25 25

Sodium cyanide 143-33-9 180 5 5

Zinc cyanide 557-21-1 180 20 20

2,4-D, salts and esters 94-75-7 47 10

DDE 72-55-9 48 10 30

Diazomethane 334-88-3 49 0.34 1

Dibenzofuran 132-64-9 50 10 30

2,3,4,7,8-Pentachlorodibenzofuran 57117-31-4 187 0.000025 0.000075

1,2-Dibromo-3-chloropropane 96-12-8 51 0.0097 0.029

Dibutylphthalate 84-74-2 52 400

p-Dichlorobenzene 106-46-7 53 12 90

3,3'-Dichlorobenzidine 91-94-1 54 2.1 6.2

Dichloroethyl ether 111-44-4 55 58

1,3-Dichloropropene 542-75-6 56 4.5 14

Dichlorvos 62-73-7 57 0.99 p0.99 p5.1 p5.1 p0.018 10

Diesel engine emissions

DIESEL 

EMIS. 999 35 100

Diethanolamine 111-42-2 58 2 6

Diethyl sulfate 64-67-5 60 1.9 4.7

N,N-diethyl/dimethylaniline Dialks 59

3,3'-Dimethoxybenzidine 119-90-4 61 1.5 5

p-Dimethylaminoazobenzene 60-11-7 62 15 50

3,3'-Dimethylbenzidine 119-93-7 63 0.1 0.3

Dimethyl carbamoyl chloride 79-44-7 64 0.88 2.6

Dimethyl formamide 68-12-2 65 i270 i110 i6 300 150

Dimethyl phthalate 131-11-3 67 200

Dimethyl sulfate 77-78-1 68 0.12 i0.045 i0.62 i0.22 i3.6

N,N-dimethylaniline 121-69-7 59 50

1,1-Dimethylhydrazine 57-14-7 66 f7.4 f0.93 f3.7

Page 3 of 8
ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.5

2,4-dinitrophenol 51-28-5 70 3 7.5

2,4-Dinitrotoluene 121-14-2 71 5

2,4/2,6-Dinitrotoluene (mixture) 25321-14-6 71 0.2 0.6

1,4-Dioxane 123-91-1 72 61 i61 i1200 i360 i7.2 3 180

1,2-Diphenylhydrazine 122-66-7 73 10 30

Epichlorohydrin 106-89-8 74 22 i22 i91 i38 i19 76 1.3 28

1,2-Epoxybutane 106-88-7 75 210 i210 i410 i410 i

Ethyl acrylate 140-88-5 76 34 i34 i150 i38 i0.041 120 120

Ethyl benzene 100-41-4 77 140 i140 i4800 i2500 i22 350

Ethyl carbamate 51-79-6 78 500 500

Ethyl chloride 75-00-3 79 40 1000

Ethylene dibromide 106-93-4 80 130 i35 i180 i50 i77

Ethylene dichloride 107-06-2 81 200 810 20

Ethylene glycol 107-21-1 82 2

Ethylene imine (Aziridine) 151-56-4 83 f8.1 f0.83 f

Ethylene oxide 75-21-8 84 f81 f14 f90 140

Ethylene thiourea 96-45-7 85 3.5 10

Ethylidene dichloride (1,1-Dichloroethane) 75-34-3 86 1200

Formaldehyde 50-00-0 87 1.1 f1.1 f17 f17 f1.2 12 0.049 0.055 2.5

Diethylene glycol monobutyl ether 112-34-5 181 100 150

Diethylene glycol monoethyl ether 111-90-0 181 140 410

Ethylene glycol ethyl ether 110-80-5 181 0.37 180

Ethylene glycol ethyl ether acetate 111-15-9 181 0.14

Ethylene glycol methyl ether 109-86-4 181 0.093

Ethylene glycol methyl ether acetate 110-49-6 181

Heptachlor 76-44-8 88 3.5

Hexachlorobenzene 118-74-1 89 0.002 0.006

Hexachlorobutadiene 87-68-3 90 11 32

Hexachlorocyclopentadiene 77-47-4 91 0.11 0.2

Hexachlorodibenzo-p-dioxin, mixture 19408-74-3 187 0.005 0.015

Hexachloroethane 67-72-1 92 58

Hexamethylene-1,6-diisocyanate 822-06-0 93 0.034 0.1

Hexamethylphosphoramide 680-31-9 94 0.29 0.92

n-Hexane 110-54-3 95 i12000 i12000 i390

Hydrazine 302-01-2 96 0.13 f0.13 f17 f2.1 f0.65 6.5 6.5

Hydrochloric acid 7647-01-0 97 2.7 f2.7 f33 f16 f4.5 30 2.1 7.5

Hydrofluoric acid 7664-39-3 98 0.82 f0.82 f20 f9.8 f1.6 16 0.016 0.24 2.5

Hydrogen sulfide 7783-06-4 999 0.71 i0.46 i38 i24 i0.14 42 0.098 0.042

Hydroquinone 123-31-9 99 5

Page 4 of 8
ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 28 28

Lead acetate 301-04-2 182 0.075 0.2

Lead chloride 7758-95-4 182 0.06 0.2

Lead compounds 7439-92-1 182 10

Lead nitrate 10099-74-8 182 0.075 0.22

Lead subacetate 1335-32-6 182 0.06 0.2

Tetraethyl lead 78-00-2 182 4

Tetramethyl lead 75-74-1 182 4

Lindane (gamma-HCH) 58-89-9 101 5

alpha-Hexachlorocyclohexane (a-HCH) 319-84-6 101 0.5 1.5

beta-Hexachlorocyclohexane (b-HCH) 319-85-7 101 0.5 1.5

technical Hexachlorocyclohexane (HCH) 608-73-1 101 0.15 0.5

Maleic anhydride 108-31-6 102 0.8 8 1

Manganese chloride 7773-01-5 183 0.4 6

Manganese compounds 7439-96-5 183 50

Manganese dioxide 1313-13-9 183 0.3 4

Manganese oxide 1317-35-7 183 0.25 0.75

Manganese sulfate 7785-87-7 183 0.5 7.5

Manganese tricarbonyl methylcyclopentadienyl 12108-13-3 183 0.6 0.6

Mercuric acetate 1600-27-7 184 0.01 0.03

Mercuric chloride 7487-94-7 184 0.035 0.12

Mercuric nitrate 10045-94-0 184 0.04 0.15

Mercuric oxide 21908-53-2 184 0.025 0.1

Mercury (elemental) 7439-97-6 184 i1.7 i0.33 i2 0.0006

Methylmercuric dicyanamide 502-39-6 184 0.015 0.04

Mercury compounds HG_CMPDS 184 1

Methoxyethylmercuric acetate 151-38-2 184 0.015 0.05

Methyl mercury 22967-92-6 184 0.2

Phenylmercuric acetate 62-38-4 184 0.1 0.1

Methanol 67-56-1 103 690 i350 i2700 i680 i260 1300 28 790

Methoxychlor 72-43-5 104 500

Methyl bromide 74-83-9 105 i820 i260 i190 0.19 3.9 97

Methyl chloride 74-87-3 106 i1900 i780 i830 1 410

Methyl chloroform (1,1,1-Trichloroethane) 71-55-6 107 1300 i1300 i3300 i1700 i1900 3800 11 68 380

Methyl hydrazine 60-34-4 109 f3.2 f0.39 f7.2

Methyl iodide 74-88-4 110 150 290 58

Methyl isobutyl ketone 108-10-1 111 310 310

Methyl isocyanate 624-83-9 112 f0.16 f0.019 f0.058 0.58 0.7

Methyl methacrylate 80-62-6 113 70 i70 i490 i200 i410

Methyl tert-butyl ether 1634-04-4 114 180 i180 i2100 i1400 i7.2

Page 5 of 8
ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.11 0.33

Methylene chloride 75-09-2 116 690 i i1900 i210 i1000 2600 2.1 14 800

Methylene diphenyl diisocyanate 101-68-8 117 5 7.5

4,4'-Methylenedianiline 101-77-9 118 0.081 0.81

Naphthalene 91-20-3 119 130

Nickel acetate 373-02-4 186

Nickel carbonyl 13463-39-3 186 f0.25 f0.031 f1.4

Nickel chloride 7718-54-9 186 0.6 0.6

Nickel compounds 7440-02-0 186 1

Nickel nitrate 13138-45-9 186 3 3

Nickel oxide 1313-99-1 186 0.75 0.75

Nickel refinery dust NI_DUST 186

Nickel subsulfide 12035-72-2 186

Nickel sulfate 7786-81-4 186 2.5 2.5

Nitrobenzene 98-95-3 120 100

4-Nitrobiphenyl 92-93-3 121 0.25 0.75

4-Nitrophenol 100-02-7 122 0.75 2.5

2-Nitropropane 79-46-9 123 36

Nitrosodimethylamine 62-75-9 125 3.5 10

N-Nitrosomorpholine 59-89-2 126 12 30

N-Nitroso-N-methylurea 684-93-5 124 0.015 0.05

Parathion 56-38-2 127 i1.5 i0.48 i1

Polychlorinated biphenyls 1336-36-3 136 1 3

Aroclor 1016 12674-11-2 136 0.2 0.6

Aroclor 1221 11104-28-2 136 0.2 0.6

Aroclor 1242 53469-21-9 136 1 3

Aroclor 1248 12672-29-6 136 0.2 0.6

Aroclor 1254 11097-69-1 136 0.5 1.5

Aroclor 1260 11096-82-5 136 0.3 0.75

Pentachloronitrobenzene 82-68-8 128 0.5 1.5

Pentachlorophenol 87-86-5 129 0.25

Phenol 108-95-2 130 58 f24 f89 f46 f38 190 5.8 96

p-Phenylenediamine 106-50-3 131 0.1 0.3

Phosgene 75-44-5 132 f1.2 f0.16 f2.0 0.004 0.81

Phosphine 7803-51-2 133 f2.8 f0.35 f0.7

Phosphorus, white 7723-14-0 134 0.02

Phthalic anhydride 85-44-9 135 6

Acenaphthene 83-32-9 187 0.4 1.2

Anthracene 120-12-7 187 2 6

Benzo(a)anthracene 56-55-3 187 0.1 0.3

Page 6 of 8
ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.2 0.6

Benzo(k)fluoranthene 207-08-9 187 0.2 0.6

Benzo(g,h,i)perylene 191-24-2 187 10 30

Benzo(a)pyrene 50-32-8 187 0.2 0.6

Carbazole 86-74-8 187 0.75 2.5

beta-Chloronaphthalene 91-58-7 187 0.2 0.6

Chrysene 218-01-9 187 0.2 0.6

Dibenz(a,h)anthracene 53-70-3 187 10 30

Dibenzo[a,e]pyrene 192-65-4 187 0.035 0.1

Fluoranthene 206-44-0 187 0.005 0.015

Fluorene 86-73-7 187 7.5 25

Indeno(1,2,3-cd)pyrene 193-39-5 187 0.15 0.5

3-Methylcholanthrene 56-49-5 187 0.2 0.6

1-Methylnaphthalene 90-12-0 187 6 20

2-Methylnaphthalene 91-57-6 187 6 20

2-Naphthylamine 91-59-8 187 2.5 7.5

1-Nitropyrene 5522-43-0 187 0.1 0.3

Phenanthrene 85-01-8 187 0.4 1

Pyrene 129-00-0 187 15 15

1,3-Propane sultone 1120-71-4 137 0.4 1.2

beta-Propiolactone 57-57-8 138 1.5 1.5

Propionaldehyde 123-38-6 139 110 i110 i620 i260 i

Propoxur 114-26-1 140 0.5 1.5

Propylene dichloride 78-87-5 141 0.23 180

Propylene oxide 75-56-9 142 170 f170 f690 f200 f120 590 3.1 95

1,2-Propyleneimine 75-55-8 143 f28 f2.8 f

Quinoline 91-22-5 144 1.1 3.2

Quinone 106-51-4 145 10

Selenium compounds 7782-49-2 189 0.1

Hydrogen selenide 7783-07-5 189 i2.4 i0.86 i0.66 0.005 0.33

Potassium selenate 7790-59-2 189 0.5 1.5

Selenious acid 7783-00-8 189 0.3 1

Selenium dioxide 7446-08-4 189 0.25 0.75

Selenium disulfide 7488-56-4 189 0.35 1

Selenium oxychloride 7791-23-3 189 0.4 1.2

Selenium sulfide 7446-34-6 189 0.25 0.75

Sodium selenate 13410-01-0 189 0.5 1.5

Sodium selenite 10102-18-8 189 0.4 1.2

Styrene 100-42-5 146 85 i85 i550 i550 i210 1100 21 21 300

Styrene oxide 96-09-3 147 20 61

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ERPG-1 ERPG-2 MRL REL IDLH/10 TEEL-0 TEEL-1

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

Table 2. Acute Dose-Response Values for Screening Risk Assessments (9/18/2014). AEGL = Acute exposure guideline levels for mild effects (AEGL-1) and moderate effects (AEGL-2) for 1- and 8-hour 

exposures. 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) and irreversible or 

serious effects (ERPG-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 effects. 

Most, but not all, RELs are for 1-hour 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 

exposures. TEEL = US DOE Temporary 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 

methodology, and do not undergo peer review. They are 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 (9/18/2014) 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 0.0006 0.0015

1,1,2,2-Tetrachloroethane 79-34-5 149 69

Tetrachloroethene 127-18-4 150 240 i240 i1600 i550 i680 1400 1.4 20 100

Titanium tetrachloride 7550-45-0 151 0.54 i0.54 i7.8 i0.73 i5 20

Toluene 108-88-3 152 750 i750 i4500 i2400 i190 1100 3.8 37 190

2,4-Toluene diamine 95-80-7 153 4 12

2,4/2,6-Toluene diisocyanate mixture (TDI) 26471-62-5 154 1.8 5.3

2,4-Toluene diisocyanate 584-84-9 154 0.14 f0.071 f0.59 f0.15 f0.071 1.1 1.8

o-Toluidine 95-53-4 155 22

Toxaphene 8001-35-2 156 0.5 1

1,2,4-Trichlorobenzene 120-82-1 157 37 37

1,1,2-Trichloroethane 79-00-5 158 55

Trichloroethylene 79-01-6 159 700 i410 i2400 i1300 i540 2700 11

2,4,5-Trichlorophenol 95-95-4 160 10 30

2,4,6-Trichlorophenol 88-06-2 161 10 30

Triethylamine 121-44-8 162 2.8

Trifluralin 1582-09-8 163 0.025 0.075

2,2,4-trimethylpentane 540-84-1 164 350 350

Uranium compounds 7440-61-1 188 1

Uranium (IV) dioxide 1344-57-6 188 10

Uranium hexafluoride 7783-81-5 188 3.6 f f9.6 f1.2 f5 15

Uranium oxide 1344-59-8 188 10

Uranium, soluble salts URANSOLS 188 0.05 0.6

Uranyl acetate dihydrate 541-09-3 188 0.075 1

Uranyl nitrate hexahydrate 13520-83-7 188 0.1 1.2

Vinyl acetate 108-05-4 165 24 i24 i630 i260 i18 260

Vinyl bromide 593-60-2 166 22 66

Vinyl chloride 75-01-4 167 640 i180 i3100 i2100 i1300 13000 1.3 180

Vinylidene chloride 75-35-4 168 20 79

m-Xylene 108-38-3 171 22 390

o-Xylene 95-47-6 170 22 390

p-Xylene 106-42-3 172 22 390

Xylenes (mixed) 1330-20-7 169 560 i560 i4000 i1700 i8.7 22 390

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