December 2010 ATSDR Minimal Risk Levels Page 1 of 14

Agency for Toxic Substances and Disease Registry

MINIMAL RISK LEVELS (MRLs)

December 2010

 Dura- Uncertainty Cover CAS

Name Route tion MRL Factors Endpoint Status Date Number

______________________________________________________________________________________________________________

ACENAPHTHENE Oral Int. 0.6 mg/kg/day 300 Hepatic Final 08/95 83-32-9

ACETONE Inh. Acute 26 ppm 9 Neurol. Final 05/94 67-64-1

 Int. 13 ppm 100 Neurol.

 Chr. 13 ppm 100 Neurol.

 Oral Int. 2 mg/kg/day 100 Hemato.

ACROLEIN Inh. Acute 0.003 ppm 100 Resp. Final 08/07 107-02-8

 Int. 0.00004 ppm 300 Resp.

 Oral Int. 0.004 mg/kg/day 100 Gastro.

ACRYLAMIDE Oral Acute 0.02 mg/kg/day 100 Repro. Draft 09/09 79-06-1

 Int. 0.002 mg/kg/day 100 Neurol.

ACRYLONITRILE Inh. Acute 0.1 ppm 10 Neurol. Final 12/90 107-13-1

 Oral Acute 0.1 mg/kg/day 100 Develop.

 Int. 0.01 mg/kg/day 1000 Repro.

Chr. 0.04 mg/kg/day 100 Hemato.

ALDRIN Oral Acute 0.002 mg/kg/day 1000 Develop. Final 09/02 309-00-2

 Chr. 0.00003 mg/kg/day 1000 Hepatic

ALUMINUM Oral Int. 1.0 mg/kg/day 30 Neurol. Final 09/08 7429-90-5

 Chr. 1.0 mg/kg/day 90 Neurol.

AMERICIUM Rad. Acute 4 mSv 3 Develop. Final 10/04 7440-35-9

 Chr. 1 mSv/yr 3 Other

AMMONIA Inh. Acute 1.7 ppm 30 Resp. Final 10/04 7664-41-7

 Chr. 0.1 ppm 30 Resp.

ANTHRACENE Oral Int. 10 mg/kg/day 100 Hepatic Final 08/95 120-12-7
December 2010 ATSDR Minimal Risk Levels Page 2 of 14

ARSENIC Oral Acute 0.005 mg/kg/day 10 Gastro. Final 08/07 7440-38-2

 Chr. 0.0003 mg/kg/day 3 Dermal

ATRAZINE Oral Acute 0.01 mg/kg/day 100 Body Wt. Final 09/03 1912-24-9

 Int. 0.003 mg/kg/day 300 Repro.

BARIUM, SOLUBLE SALTS Oral Int. 0.2 mg/kg/day 100 Renal Final 08/07 7440-39-3

 Chr. 0.2 mg/kg/day 100 Renal

BENZENE Inh. Acute 0.009 ppm 300 Immuno. Final 08/07 71-43-2

 Int. 0.006 ppm 300 Immuno.

Chr. 0.003 ppm 10 Immuno.

 Oral Chr. 0.0005 mg/kg/day 30 Immuno.

BERYLLIUM Oral Chr. 0.002 mg/kg/day 300 Gastro. Final 09/02 7440-41-7

BIS(2-CHLOROETHYL) ETHER Inh. Int. 0.02 ppm 1000 Body Wt. Final 12/89 111-44-4

BIS(CHLOROMETHYL) ETHER Inh. Int. 0.0003 ppm 100 Resp. Final 12/89 542-88-1

BORON Inh. Acute 0.3 mg/m3 3 Resp. Final 11/10 7440-42-8

 Oral Acute 0.2 mg/kg/day 100 Develop.

 Int. 0.2 mg/kg/day 66 Develop.

BROMODICHLOROMETHANE Oral Acute 0.04 mg/kg/day 1000 Hepatic Final 12/89 75-27-4

 Chr. 0.02 mg/kg/day 1000 Renal

BROMOFORM Oral Acute 0.7 mg/kg/day 100 Hepatic Final 09/05 75-25-2

 Int. 0.2 mg/kg/day 300 Hepatic

Chr. 0.02 mg/kg/day 3000 Hepatic

BROMOMETHANE Inh. Acute 0.05 ppm 100 Neurol. Final 09/92 74-83-9

 Int. 0.05 ppm 100 Neurol.

 Chr. 0.005 ppm 100 Neurol.

 Oral Int. 0.003 mg/kg/day 100 Gastro.

1,3-BUTADIENE Inh. Acute 0.1 ppm 90 Develop. Draft 09/09 106-99-0

2-BUTOXYETHANOL Inh. Acute 6 ppm 9 Hemato. Final 10/98 111-76-2

(ETHYLENE GLYCOL MONOBUTYL ETHER) Int. 3 ppm 9 Hemato.

 Chr. 0.2 ppm 3 Hemato.

 Oral Acute 0.4 mg/kg/day 90 Hemato.

 Int. 0.07 mg/kg/day 1000 Hepatic
December 2010 ATSDR Minimal Risk Levels Page 3 of 14

CADMIUM Inh. Acute 0.00003 mg/m3 300 Resp. Draft 09/08 7440-43-9

 Chr. 0.00001 mg/m3 9 Renal

 Oral Int. 0.0005 mg/kg/day 100 Musculo.

 Chr. 0.0001 mg/kg/day 3 Renal

CARBON DISULFIDE Inh. Chr. 0.3 ppm 30 Neurol. Final 08/96 75-15-0

 Oral Acute 0.01 mg/kg/day 300 Hepatic

CARBON TETRACHLORIDE Inh. Int. 0.03 ppm 30 Hepatic Final 09/05 56-23-5

 Chr. 0.03 ppm 30 Hepatic

 Oral Acute 0.02 mg/kg/day 300 Hepatic

 Int. 0.007 mg/kg/day 100 Hepatic

CESIUM Rad. Acute 4 mSv 3 Develop. Final 10/04 7440-46-2

 Chr. 1 mSv/yr 3 Other

CHLORDANE Inh. Int. 0.0002 mg/m3 100 Hepatic Final 05/94 57-74-9

 Chr. 0.00002 mg/m3 1000 Hepatic

 Oral Acute 0.001 mg/kg/day 1000 Develop.

 Int. 0.0006 mg/kg/day 100 Hepatic

Chr. 0.0006 mg/kg/day 100 Hepatic

CHLORDECONE Oral Acute 0.01 mg/kg/day 100 Neurol. Final 08/95 143-50-0

 Int. 0.0005 mg/kg/day 100 Renal

Chr. 0.0005 mg/kg/day 100 Renal

CHLORFENVINPHOS Oral Acute 0.002 mg/kg/day 1000 Neurol. Final 09/97 470-90-6

 Int. 0.002 mg/kg/day 1000 Immuno.

Chr. 0.0007 mg/kg/day 1000 Neurol.

CHLORINE Inh. Acute 0.06 ppm 3 Resp. Final 11/10 7782-50-5

 Int. 0.002 ppm 90 Resp.

 Chr. 0.00005 ppm 30 Resp.

CHLORINE DIOXIDE Inh. Int. 0.001 ppm 300 Resp. Final 10/04 10049-04-4

CHLORITE Oral Int. 0.1 mg/kg/day 30 Neurol. Final 10/04 7758-19-2

CHLOROBENZENE Oral Int. 0.4 mg/kg/day 100 Hepatic Final 12/90 108-90-7

CHLORODIBROMOMETHANE Oral Acute 0.1 mg/kg/day 300 Hepatic Final 09/05 124-48-1

 Chr. 0.09 mg/kg/day 300 Hepatic

CHLOROETHANE Inh. Acute 15 ppm 100 Develop. Final 12/98 75-00-3
December 2010 ATSDR Minimal Risk Levels Page 4 of 14

CHLOROFORM Inh. Acute 0.1 ppm 30 Hepatic Final 09/97 67-66-3

 Int. 0.05 ppm 300 Hepatic

Chr. 0.02 ppm 100 Hepatic

 Oral Acute 0.3 mg/kg/day 100 Hepatic

 Int. 0.1 mg/kg/day 100 Hepatic

Chr. 0.01 mg/kg/day 1000 Hepatic

CHLOROMETHANE Inh. Acute 0.5 ppm 100 Neurol. Final 12/98 74-87-3

 Int. 0.2 ppm 300 Hepatic

 Chr. 0.05 ppm 1000 Neurol.

4-CHLOROPHENOL Oral Acute 0.01 mg/kg/day 100 Hepatic Final 07/99 106-48-9

CHLORPYRIFOS Oral Acute 0.003 mg/kg/day 10 Neurol. Final 09/97 2921-88-2

 Int. 0.003 mg/kg/day 10 Neurol.

Chr. 0.001 mg/kg/day 100 Neurol.

CHROMIUM(III) SOLUBLE PARTICULATES Inh. Int. 0.0001 mg/m3 300 Resp. Draft 09/08 16065-83-1

CHROMIUM(III) INSOL. PARTICULATES Inh. Int. 0.005 mg/m3 90 Resp. Draft 09/08 16065-83-1

CHROMIUM(VI) Oral Int. 0.005 mg/kg/day 100 Hemato. Draft 09/08 18540-29-9

 Chr. 0.001 mg/kg/day 100 Gastro.

CHROMIUM(VI), AEROSOL MISTS Inh. Int. 0.000005 mg/m3 100 Resp. Draft 09/08 18540-29-9

 Chr. 0.000005 mg/m3 100 Resp.

CHROMIUM(VI), PARTICULATES Inh. Int. 0.0003 mg/m3 30 Resp. Draft 09/08 18540-29-9

COBALT Inh. Chr. 0.0001 mg/m3 10 Resp. Final 10/04 7440-48-4

 Oral Int. 0.01 mg/kg/day 100 Hemato.

Rad. Acute 4 mSv 3 Develop.

 Chr. 1 mSv/yr 3 Other

COPPER Oral Acute 0.01 mg/kg/day 3 Gastro. Final 10/04 7440-50-8

 Int. 0.01 mg/kg/day 3 Gastro.

CRESOLS Oral Int. 0.1 mg/kg/day 100 Resp. Final 09/08 1319-77-3

 Chr. 0.1 mg/kg/day 1000 Resp.

CYANIDE, SODIUM Oral Int. 0.05 mg/kg/day 100 Repro. Final 07/06 143-33-9
December 2010 ATSDR Minimal Risk Levels Page 5 of 14

CYHALOTHRIN Oral Acute 0.01 mg/kg/day 100 Gastro. Final 09/03 68085-85-8

 Int. 0.01 mg/kg/day 100 Gastro.

CYPERMETHRIN Oral Acute 0.02 mg/kg/day 100 Neurol. Final 09/03 52315-07-8

DDT, P,P'- Oral Acute 0.0005 mg/kg/day 1000 Develop. Final 09/02 50-29-3

 Int. 0.0005 mg/kg/day 100 Hepatic

DIAZINON Inh. Int. 0.01 mg/m3 30 Neurol. Final 09/08 333-41-5

 Oral Acute 0.006 mg/kg/day 100 Neurol.

 Int. 0.002 mg/kg/day 100 Neurol.

Chr. 0.0007 mg/kg/day 100 Neurol.

1,2-DIBROMO-3-CHLOROPROPANE Inh. Int. 0.0002 ppm 100 Repro. Final 09/92 96-12-8

 Oral Int. 0.002 mg/kg/day 1000 Repro.

DI-N-BUTYL PHTHALATE Oral Acute 0.5 mg/kg/day 100 Develop. Final 09/01 84-74-2

1,2-DICHLOROBENZENE Oral Acute 0.7 mg/kg/day 100 Hepatic Final 07/06 95-50-1

 Int. 0.6 mg/kg/day 100 Hepatic

Chr. 0.3 mg/kg/day 100 Renal

1,3-DICHLOROBENZENE Oral Acute 0.4 mg/kg/day 100 Hepatic Final 07/06 541-73-1

 Int. 0.02 mg/kg/day 100 Endocr.

1,4-DICHLOROBENZENE Inh. Acute 2 ppm 10 Ocular Final 07/06 106-46-7

 Int. 0.2 ppm 100 Hepatic

 Chr. 0.01 ppm 30 Resp.

 Oral Int. 0.07 mg/kg/day 100 Hepatic

 Chr. 0.07 mg/kg/day 100 Hepatic

1,2-DICHLOROETHANE Inh. Chr. 0.6 ppm 90 Hepatic Final 09/01 107-06-2

 Oral Int. 0.2 mg/kg/day 300 Renal

1,1-DICHLOROETHENE Inh. Int. 0.02 ppm 100 Hepatic Final 05/94 75-35-4

 Oral Chr. 0.009 mg/kg/day 1000 Hepatic

1,2-DICHLOROETHENE, CIS- Oral Acute 1 mg/kg/day 100 Hemato. Final 08/96 156-59-2

 Int. 0.3 mg/kg/day 100 Hemato.

1,2-DICHLOROETHENE, TRANS- Inh. Acute 0.2 ppm 1000 Hepatic Final 08/96 156-60-5

 Int. 0.2 ppm 1000 Hepatic

 Oral Int. 0.2 mg/kg/day 100 Hepatic
December 2010 ATSDR Minimal Risk Levels Page 6 of 14

2,4-DICHLOROPHENOL Oral Int. 0.003 mg/kg/day 100 Immuno. Final 07/99 120-83-2

1,2-DICHLOROPROPANE Inh. Acute 0.05 ppm 1000 Resp. Final 12/89 78-87-5

 Int. 0.007 ppm 1000 Resp.

 Oral Acute 0.1 mg/kg/day 1000 Neurol.

 Int. 0.07 mg/kg/day 1000 Hemato.

Chr. 0.09 mg/kg/day 1000 Hepatic

1,3-DICHLOROPROPENE Inh. Int. 0.008 ppm 30 Resp. Final 09/08 542-75-6

 Chr. 0.007 ppm 30 Resp.

 Oral Int. 0.04 mg/kg/day 100 Gastro.

 Chr. 0.03 mg/kg/day 100 Gastro.

2,3-DICHLOROPROPENE Inh. Acute 0.002 ppm 90 Resp. Final 09/08 78-88-6

DICHLORVOS Inh. Acute 0.002 ppm 100 Neurol. Final 09/97 62-73-7

 Int. 0.0003 ppm 100 Neurol.

Chr. 0.00006 ppm 100 Neurol.

 Oral Acute 0.004 mg/kg/day 1000 Neurol.

 Int. 0.003 mg/kg/day 10 Neurol.

 Chr. 0.0005 mg/kg/day 100 Neurol.

DIELDRIN Oral Int. 0.0001 mg/kg/day 100 Neurol. Final 09/02 60-57-1

 Chr. 0.00005 mg/kg/day 100 Hepatic

DI(2-ETHYLHEXYL)PHTHALATE Oral Int. 0.1 mg/kg/day 100 Repro. Final 09/02 117-81-7

 Chr. 0.06 mg/kg/day 100 Repro.

DIETHYL PHTHALATE Oral Acute 7 mg/kg/day 300 Repro. Final 06/95 84-66-2

 Int. 6 mg/kg/day 300 Hepatic

DIISOPROPYL METHYLPHOSPHONATE Oral Int. 0.8 mg/kg/day 100 Hemato. Final 10/98 1445-75-6

(DIMP) Chr. 0.6 mg/kg/day 100 Hemato.

DIMETHYLARSINIC ACID (DMA) Oral Chr. 0.02 mg/kg/day 100 Renal Final 08/07 75-60-5

1,1-DIMETHYLHYDRAZINE Inh. Int. 0.0002 ppm 300 Hepatic Final 09/97 57-14-7

1,2-DIMETHYLHYDRAZINE Oral Int. 0.0008 mg/kg/day 1000 Hepatic Final 09/97 540-73-8

1,3-DINITROBENZENE Oral Acute 0.008 mg/kg/day 100 Repro. Final 06/95 99-65-0

 Int. 0.0005 mg/kg/day 1000 Hemato.
December 2010 ATSDR Minimal Risk Levels Page 7 of 14

4,6-DINITRO-O-CRESOL Oral Acute 0.004 mg/kg/day 100 Neurol. Final 08/95 534-52-1

 Int. 0.004 mg/kg/day 100 Neurol.

2,4-DINITROPHENOL Oral Acute 0.01 mg/kg/day 100 Body Wt. Final 08/95 51-28-5

2,4-DINITROTOLUENE Oral Acute 0.05 mg/kg/day 100 Neurol. Final 12/98 121-14-2

 Chr. 0.002 mg/kg/day 100 Hemato.

2,6-DINITROTOLUENE Oral Int. 0.004 mg/kg/day 1000 Hemato. Final 12/98 606-20-2

DI-N-OCTYL PHTHALATE Oral Acute 3 mg/kg/day 300 Hepatic Final 09/97 117-84-0

 Int. 0.4 mg/kg/day 100 Hepatic

1,4-DIOXANE Inh. Acute 2 ppm 30 Ocular Draft 09/07 123-91-1

 Int. 1 ppm 30 Hepatic

Chr. 1 ppm 30 Hepatic

 Oral Acute 4 mg/kg/day 100 Resp.

 Int. 0.6 mg/kg/day 100 Hepatic

Chr. 0.1 mg/kg/day 100 Hepatic

DISULFOTON Inh. Acute 0.006 mg/m3 30 Neurol. Final 08/95 298-04-4

 Int. 0.0002 mg/m3 30 Neurol.

 Oral Acute 0.001 mg/kg/day 100 Neurol.

 Int. 0.00009 mg/kg/day 100 Develop.

Chr. 0.00006 mg/kg/day 1000 Neurol.

ENDOSULFAN Oral Int. 0.005 mg/kg/day 100 Immuno. Final 09/00 115-29-7

 Chr. 0.002 mg/kg/day 100 Hepatic

ENDRIN Oral Int. 0.002 mg/kg/day 100 Neurol. Final 08/96 72-20-8

 Chr. 0.0003 mg/kg/day 100 Neurol.

ETHION Oral Acute 0.002 mg/kg/day 30 Neurol. Final 09/00 563-12-2

 Int. 0.002 mg/kg/day 30 Neurol.

Chr. 0.0004 mg/kg/day 150 Neurol.

ETHYLBENZENE Inh. Acute 5 ppm 30 Neurol. Final 11/10 100-41-4

 Int. 2 ppm 30 Neurol.

 Chr. 0.06 ppm 300 Renal

 Oral Int. 0.4 mg/kg/day 30 Hepatic

ETHYLENE GLYCOL Inh. Acute 2 mg/m3 10 Resp. Final 11/10 107-21-1

 Oral Acute 0.8 mg/kg/day 100 Develop.

 Int. 0.8 mg/kg/day 100 Develop.
December 2010 ATSDR Minimal Risk Levels Page 8 of 14

ETHYLENE OXIDE Inh. Int. 0.09 ppm 100 Renal Final 12/90 75-21-8

FLUORANTHENE Oral Int. 0.4 mg/kg/day 300 Hepatic Final 08/95 206-44-0

FLUORENE Oral Int. 0.4 mg/kg/day 300 Hepatic Final 08/95 86-73-7

FLUORIDE, SODIUM Oral Chr. 0.05 mg/kg/day 3 Musculo. Final 09/03 7681-49-4

FLUORINE Inh. Acute 0.01 ppm 10 Resp. Final 09/03 7782-41-4

FORMALDEHYDE Inh. Acute 0.04 ppm 9 Resp. Final 07/99 50-00-0

 Int. 0.03 ppm 30 Resp.

 Chr. 0.008 ppm 30 Resp.

 Oral Int. 0.3 mg/kg/day 100 Gastro.

 Chr. 0.2 mg/kg/day 100 Gastro.

FUEL OIL NO.2 Inh. Acute 0.02 mg/m3 1000 Neurol. Final 06/95 68476-30-2

GUTHION (AZINPHOS-METHYL) Inh. Acute 0.02 mg/m3 30 Neurol. Final 09/08 86-50-0

 Int. 0.01 mg/m3 30 Neurol.

 Chr. 0.01 mg/m3 30 Neurol.

 Oral Acute 0.01 mg/kg/day 100 Neurol.

 Int. 0.003 mg/kg/day 100 Neurol.

 Chr. 0.003 mg/kg/day 100 Neurol.

HEPTACHLOR Oral Acute 0.0006 mg/kg/day 3000 Repro. Final 08/07 76-44-8

 Int. 0.0001 mg/kg/day 300 Immuno.

HEXACHLOROBENZENE Oral Acute 0.008 mg/kg/day 300 Develop. Final 09/02 118-74-1

 Int. 0.0001 mg/kg/day 90 Repro.

Chr. 0.00005 mg/kg/day 300 Develop.

HEXACHLOROBUTADIENE Oral Int. 0.0002 mg/kg/day 1000 Renal Final 05/94 87-68-3

ALPHA-HEXACHLOROCYCLOHEXANE Oral Chr. 0.008 mg/kg/day 100 Hepatic Final 09/05 319-84-6

BETA-HEXACHLOROCYCLOHEXANE Oral Acute 0.05 mg/kg/day 100 Neurol. Final 09/05 319-85-7

 Int. 0.0006 mg/kg/day 300 Hepatic

GAMMA-HEXACHLOROCYCLOHEXANE Oral Acute 0.003 mg/kg/day 300 Develop. Final 09/05 58-89-9

 Int. 0.00001 mg/kg/day 1000 Immuno.
December 2010 ATSDR Minimal Risk Levels Page 9 of 14

HEXACHLOROCYCLOPENTADIENE Inh. Int. 0.01 ppm 30 Resp. Final 07/99 77-47-4

 Chr. 0.0002 ppm 90 Resp.

 Oral Int. 0.1 mg/kg/day 100 Renal

HEXACHLOROETHANE Inh. Acute 6 ppm 30 Neurol. Final 09/97 67-72-1

 Int. 6 ppm 30 Neurol.

 Oral Acute 1 mg/kg/day 100 Hepatic

 Int. 0.01 mg/kg/day 100 Hepatic

HEXAMETHYLENE DIISOCYANATE Inh. Int. 0.00003 ppm 30 Resp. Final 10/98 822-06-0

 Chr. 0.00001 ppm 90 Resp.

N-HEXANE Inh. Chr. 0.6 ppm 100 Neurol. Final 07/99 110-54-3

HMX (CYCLOTETRAMETHYLENE Oral Acute 0.1 mg/kg/day 1000 Neurol. Final 09/97 2691-41-0

 TETRANITRAMINE) Int. 0.05 mg/kg/day 1000 Hepatic

HYDRAZINE Inh. Int. 0.004 ppm 300 Hepatic Final 09/97 302-01-2

HYDROGEN FLUORIDE Inh. Acute 0.02 ppm 30 Resp. Final 09/03 7664-39-3

HYDROGEN SULFIDE Inh. Acute 0.07 ppm 27 Resp. Final 07/06 7783-06-4

 Int. 0.02 ppm 30 Resp.

IODIDE Oral Acute 0.01 mg/kg/day 1 Endocr. Final 10/04 7553-56-2

 Chr. 0.01 mg/kg/day 1 Endocr.

IONIZING RADIATION, N.O.S. Rad. Acute 4 mSv 3 Neurol. Final 09/99 HZ1800-45-T

 Chr. 1 mSv/yr 3 Other

ISOPHORONE Oral Int. 3 mg/kg/day 100 Other Final 12/89 78-59-1

 Chr. 0.2 mg/kg/day 1000 Hepatic

JP-4 Inh. Int. 9 mg/m3 300 Hepatic Final 06/95 50815-00-4

JP-5/JP-8 Inh. Int. 3 mg/m3 300 Hepatic Final 10/98 HZ0600-26-T

JP-7 Inh. Chr. 0.3 mg/m3 300 Hepatic Final 06/95 HZ0600-22-T

KEROSENE Inh. Int. 0.01 mg/m3 1000 Hepatic Final 06/95 8008-20-6
December 2010 ATSDR Minimal Risk Levels Page 10 of 14

MALATHION Inh. Acute 0.2 mg/m3 100 Neurol. Final 09/03 121-75-5

 Int. 0.02 mg/m3 1000 Resp.

 Oral Int. 0.02 mg/kg/day 10 Neurol.

 Chr. 0.02 mg/kg/day 100 Neurol.

MANGANESE, RESPIRABLE Inh. Chr. 0.04 ug/m3 500 Neurol. Addendum 09/10 7439-96-5

MERCURIC CHLORIDE Oral Acute 0.007 mg/kg/day 100 Renal Final 03/99 7487-94-7

 Int. 0.002 mg/kg/day 100 Renal

MERCURY Inh. Chr. 0.0002 mg/m3 30 Neurol. Final 03/99 7439-97-6

METHOXYCHLOR Oral Int. 0.005 mg/kg/day 1000 Repro. Final 09/02 72-43-5

4,4'-METHYLENEBIS(2-CHLOROANILINE) Oral Chr. 0.003 mg/kg/day 3000 Hepatic Final 05/94 101-14-4

METHYLENE CHLORIDE Inh. Acute 0.6 ppm 100 Neurol. Final 09/00 75-09-2

 Int. 0.3 ppm 90 Hepatic

Chr. 0.3 ppm 30 Hepatic

 Oral Acute 0.2 mg/kg/day 100 Neurol.

 Chr. 0.06 mg/kg/day 100 Hepatic

4,4'-METHYLENEDIANILINE Oral Acute 0.2 mg/kg/day 300 Hepatic Final 10/98 101-77-9

 Int. 0.08 mg/kg/day 100 Hepatic

METHYLMERCURY Oral Chr. 0.0003 mg/kg/day 4.5 Develop. Final 03/99 22967-92-6

1-METHYLNAPHTHALENE Oral Chr. 0.07 mg/kg/day 1000 Resp. Final 09/05 90-12-0

2-METHYLNAPHTHALENE Oral Chr. 0.04 mg/kg/day 100 Resp. Final 09/05 91-57-6

METHYL PARATHION Oral Int. 0.0007 mg/kg/day 300 Neurol. Final 09/01 298-00-0

 Chr. 0.0003 mg/kg/day 100 Hemato.

METHYL-T-BUTYL ETHER Inh. Acute 2 ppm 100 Neurol. Final 08/96 1634-04-4

 Int. 0.7 ppm 100 Neurol.

Chr. 0.7 ppm 100 Renal

 Oral Acute 0.4 mg/kg/day 100 Neurol.

 Int. 0.3 mg/kg/day 300 Hepatic

MIREX Oral Chr. 0.0008 mg/kg/day 100 Hepatic Final 08/95 2385-85-5

MONOMETHYLARSONIC ACID Oral Int. 0.1 mg/kg/day 100 Gastro. Final 08/07 124-58-3

(MMA) Chr. 0.01 mg/kg/day 100 Renal
December 2010 ATSDR Minimal Risk Levels Page 11 of 14

NAPHTHALENE Inh. Chr. 0.0007 ppm 300 Resp. Final 09/05 91-20-3

 Oral Acute 0.6 mg/kg/day 90 Neurol.

 Int. 0.6 mg/kg/day 90 Neurol.

N-NITROSODI-N-PROPYLAMINE Oral Acute 0.095 mg/kg/day 100 Hepatic Final 12/89 621-64-7

NICKEL Inh. Int. 0.0002 mg/m3 30 Resp. Final 09/05 7440-02-0

 Chr. 0.00009 mg/m3 30 Resp.

2,3,4,7,8-PENTACHLORODIBENZOFURAN Oral Acute 0.001 ug/kg/day 3000 Immuno. Final 05/94 57117-31-4

 Int. 0.00003 ug/kg/day 3000 Hepatic

PENTACHLOROPHENOL Oral Acute 0.005 mg/kg/day 1000 Develop. Final 09/01 87-86-5

 Int. 0.001 mg/kg/day 1000 Repro.

Chr. 0.001 mg/kg/day 1000 Endocr.

PERCHLORATES Oral Chr. 0.0007 mg/kg/day 10 Endocr. Final 08/08 7778-74-7

PERMETHRIN Oral Acute 0.3 mg/kg/day 100 Neurol. Final 09/03 52645-53-1

 Int. 0.2 mg/kg/day 100 Neurol.

PHENOL Oral Acute 1 mg/kg/day 100 Body Wt. Final 09/08 108-95-2

PHOSPHORUS, WHITE Inh. Acute 0.02 mg/m3 30 Resp. Final 09/97 7723-14-0

 Oral Int. 0.0002 mg/kg/day 100 Repro.

POLYBROMINATED BIPHENYLS (PBBs) Oral Acute 0.01 mg/kg/day 100 Endocr. Final 10/04 36355-01-8

POLYBROMINATED DIPHENYL ETHERS Inh Int. 0.006 mg/m3 90 Endocr. Final 10/04 32534-81-9

(PBDEs), LOWER BROMINATED Oral Acute 0.03 mg/kg/day 30 Endocr. 32536-52-0

 Int. 0.007 mg/kg/day 300 Hepatic

PBDEs, DECABROMINATED Oral Int. 10 mg/kg/day 100 Develop. Final 10/04 1163-19-5

POLYCHLORINATED BIPHENYLS (PCBs) Oral Int. 0.03 ug/kg/day 300 Neurol. Final 11/00 11097-69-1

(Aroclor 1254) Chr. 0.02 ug/kg/day 300 Immuno.

PROPYLENE GLYCOL Inh. Int. 0.009 ppm 1000 Resp. Final 09/97 57-55-6

PROPYLENE GLYCOL DINITRATE Inh. Acute 0.003 ppm 10 Neurol. Final 06/95 6423-43-4

 Int. 0.00004 ppm 1000 Hemato.

Chr. 0.00004 ppm 1000 Hemato.
December 2010 ATSDR Minimal Risk Levels Page 12 of 14

RDX (CYCLOTRIMETHYLENETRINITRAMINE) Oral Acute 0.09 mg/kg/day 100 Neurol. Draft 07/10 121-82-4

 Int. 0.05 mg/kg/day 100 Neurol.

REFRACTORY CERAMIC FIBERS Inh. Chr. 0.03 fibers/cc 30 Resp. Final 10/04 HZ0900-26-T

SELENIUM Oral Chr. 0.005 mg/kg/day 3 Dermal Final 09/03 7782-49-2

STRONTIUM Oral Int. 2 mg/kg/day 30 Musculo. Final 10/04 7440-24-6

STYRENE Inh. Acute 5 ppm 10 Neurol. Final 11/10 100-42-5

 Chr. 0.2 ppm 30 Neurol.

 Oral Acute 0.1 mg/kg/day 1000 Neurol.

SULFUR DIOXIDE Inh. Acute 0.01 ppm 9 Resp. Final 12/98 7446-09-5

SULFUR MUSTARD Inh. Acute 0.0007 mg/m3 30 Ocular Final 09/03 505-60-2

 Int. 0.00002 mg/m3 30 Ocular

 Oral Acute 0.5 ug/kg/day 1000 Develop.

 Int. 0.07 ug/kg/day 300 Gastro.

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN Oral Acute 0.0002 ug/kg/day 21 Immuno. Final 12/98 1746-01-6

 Int. 0.00002 ug/kg/day 30 Lymphor.

Chr. 0.000001 ug/kg/day 90 Develop.

1,1,2,2-TETRACHLOROETHANE Oral Int. 0.5 mg/kg/day 100 Hepatic Final 09/08 79-34-5

TETRACHLOROETHYLENE Inh. Acute 0.2 ppm 10 Neurol. Final 09/97 127-18-4

 Chr. 0.04 ppm 100 Neurol.

 Oral Acute 0.05 mg/kg/day 100 Develop.

TIN, INORGANIC Oral Int. 0.3 mg/kg/day 100 Hemato. Final 09/05 7440-31-5

TIN, DIBUTYL-, DICHLORIDE Oral Int. 0.005 mg/kg/day 1000 Immuno. Final 09/05 683-18-1

TIN, TRIBUTYL-, OXIDE Oral Int. 0.0003 mg/kg/day 100 Immuno. Final 09/05 56-35-9

 Chr. 0.0003 mg/kg/day 100 Immuno.

TITANIUM TETRACHLORIDE Inh. Int. 0.01 mg/m3 90 Resp. Final 09/97 7550-45-0

 Chr. 0.0001 mg/m3 90 Resp.

TOLUENE Inh. Acute 1 ppm 10 Neurol. Final 09/00 108-88-3

 Chr. 0.08 ppm 100 Neurol.

 Oral Acute 0.8 mg/kg/day 300 Neurol.

 Int. 0.02 mg/kg/day 300 Neurol.
December 2010 ATSDR Minimal Risk Levels Page 13 of 14

TOXAPHENE Oral Acute 0.05 mg/kg/day 100 Neurol. Draft 9/10 8001-35-2

 Int. 0.002 mg/kg/day 100 Immuno.

TRIBUTYL PHOSPHATE Oral Acute 1.1 mg/kg/day 100 Body Wt. Draft 09/09 126-73-8

(TnBP) Int. 0.02 mg/kg/day 100 Renal

 Chr. 0.02 mg/kg/day 100 Renal

1,2,4-TRICHLOROBENZENE Oral Int. 0.1 mg/kg/day 100 Hepatic Draft 9/10 120-82-1

 Chr. 0.1 mg/kg/day 100 Hepatic

1,1,1-TRICHLOROETHANE Inh. Acute 2 ppm 100 Neurol. Final 07/06 71-55-6

 Int. 0.7 ppm 100 Neurol.

 Oral Int. 20 mg/kg/day 100 Body Wt.

1,1,2-TRICHLOROETHANE Oral Acute 0.3 mg/kg/day 100 Neurol. Final 12/89 79-00-5

 Int. 0.04 mg/kg/day 100 Hepatic

TRICHLOROETHYLENE Inh. Acute 2 ppm 30 Neurol. Final 09/97 79-01-6

 Int. 0.1 ppm 300 Neurol.

 Oral Acute 0.2 mg/kg/day 300 Develop.

1,2,3-TRICHLOROPROPANE Inh. Acute 0.0003 ppm 100 Resp. Final 09/92 96-18-4

 Oral Int. 0.08 mg/kg/day 100 Hepatic

2,4,6-TRINITROTOLUENE Oral Int. 0.0005 mg/kg/day 1000 Hepatic Final 06/95 118-96-7

TRIS(2-BUTOXYETHYL) PHOSPHATE Oral Acute 4.8 mg/kg/day 100 Body Wt. Draft 09/09 78-51-3

(TBEP) Int. 0.2 mg/kg/day 100 Hepatic

TRIS(2-CHLOROETHYL) PHOSPHATE Oral Int. 0.6 mg/kg/day 100 Neurol. Draft 09/09 115-96-8

(TCEP) Chr. 0.3 mg/kg/day 100 Renal

TRIS(1,3-DICHLORO-2-PROPYL) Oral Int. 0.05 mg/kg/day 100 Renal Draft 09/09 13674-87-8

PHOSPHATE (TDCP) Chr. 0.02 mg/kg/day 100 Renal

URANIUM, HIGHLY SOLUBLE SALTS Inh. Int. 0.0004 mg/m3 90 Renal Final 09/99 HZ1800-90-T

 Chr. 0.0003 mg/m3 30 Renal

 Oral Int. 0.002 mg/kg/day 30 Renal

URANIUM, INSOLUBLE COMPOUNDS Inh. Int. 0.008 mg/m3 30 Renal Final 09/99 HZ1800-92-T
December 2010 ATSDR Minimal Risk Levels Page 14 of 14

VANADIUM Inh. Acute 0.0008 mg/m3 90 Resp. Draft 09/09 7440-62-2

 Chr. 0.0001 mg/m3 30 Resp.

 Oral Int. 0.01 mg/kg/day 10 Hemato.

VINYL ACETATE Inh. Int. 0.01 ppm 100 Resp. Final 07/92 108-05-4

VINYL CHLORIDE Inh. Acute 0.5 ppm 30 Develop. Final 07/06 75-01-4

 Int. 0.03 ppm 30 Hepatic

 Oral Chr. 0.003 mg/kg/day 30 Hepatic

XYLENES, MIXED Inh. Acute 2 ppm 30 Neurol. Final 08/07 1330-20-7

 Int. 0.6 ppm 90 Neurol.

Chr. 0.05 ppm 300 Neurol.

 Oral Acute 1 mg/kg/day 100 Neurol.

 Int. 0.4 mg/kg/day 1000 Neurol.

Chr. 0.2 mg/kg/day 1000 Neurol.

ZINC Oral Int. 0.3 mg/kg/day 3 Hemato. Final 09/05 7440-66-6

 Chr. 0.3 mg/kg/day 3 Hemato.

______________________________________________________________________________________________________________

Total number of MRLs: 394

For Duration, Acute = 1 to 14 days, Intermediate = 15 to 364 days, and Chronic = 1 year or longer.

For general information on ATSDR Minimal Risk Levels, see www.atsdr.cdc.gov/mrls.

For more information on a specific MRL, please refer to our Toxicological Profiles,

particularly Appendix A of Profiles written after 1995.

The Profiles can be found online at www.astdr.cdc.gov or ordered via cdcinfo@cdc.gov or 1-800-CDC-INFO.