### July 2013 ATSDR Minimal Risk Levels Page 1 of 14 

## A gency for T oxic S ubstances and D isease R egistry 

# Minimal Risk Levels (MRLs) **July 2013**

**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.** 

**Oral Acute**  **Int. Chr.**  **Int. 26 ppm**  **13 ppm 13 ppm**  **2 mg/kg/day 9 Neurol.**  **100 Neurol. 100 Neurol.**  **100 Hemato. Final**  **05/94 67** 

**- 64**  **-1**

**ACROLEIN Inh.** 

**Oral Acute**  **Int. Int.**  **0.003 ppm 0.00004 ppm**  **0.004 mg/kg/day 100 Resp.**  **300 Resp. 100 Gastro.**  **Final 08/07**  **107**

**- 02**  **-8**

**ACRYLAMIDE Oral**  **Acute Int.**  **Chr. 0.01**  **mg/k g/day**  **0.001 mg/kg/day 0.001 mg/kg/day**  **30 Repro.**  **30 Neurol. 30 Neurol.**  **Final 12/12**  **79**

**- 06**  **-1**

**ACRYLONITRILE Inh.**  **Oral Acute**  **Acute Int.**  **Chr. 0.1 ppm**  **0.1 mg/kg/day 0.01 mg/kg/day**  **0.04 mg/kg/day 10 Neurol.**  **100 Develop. 1000 Repro.** 

**100 Hemato. Final**  **12/90 107** 

**- 13**  **-1**

**ALDRIN Oral**  **Acute Chr.**  **0.002 mg/kg/day 0.00003 mg/kg/day**  **1000 1000**  **Develop. Hepatic**  **Final 09/02**  **309**

**- 00**  **-2**

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

**- 90**  **-5**

**AMERICIUM Rad.**  **Acute Chr.**  **4 mSv 1 mSv/yr**  **3 3**  **Develop. Other**  **Final 10/04**  **7440**

**- 35**  **-9**

**AMMONIA Inh.**  **Acute Chr.**  **1.7 ppm 0.1 ppm**  **30 30**  **Resp. Resp.**  **Final 10/04**  **7664**

**- 41**  **-7**

**ANTHRACENE Oral Int.**  **10 mg/kg/day 100 Hepatic**  **Final 08/95 120** 

**- 12**  **-7**

### July 2013 ATSDR Minimal Risk Levels Page 2 of 14 **ARSENIC Oral**  **Acute Chr.**  **0.005 mg/kg/day 0.0003 mg/kg/day**  **10 Gastro. 3 Dermal**  **Final 08/07**  **7440**

**- 38**  **-2**

**ATRAZINE Oral**  **Acute Int.**  **0.01 mg/kg/day 0.003 mg/kg/day**  **100 Body Wt. 300 Repro.**  **Final 09/03**  **1912**

**- 24**  **-9**

**BARIUM, SOLUBLE SALTS Oral**  **Int. Chr.**  **0.2 mg/kg/day 0.2 mg/kg/day**  **100 Renal 100 Renal**  **Final 08/07**  **7440**

**- 39**  **-3**

**BENZENE Inh.** 

**Oral Acute**  **Int. Chr** 

**. Chr.**  **0.009 ppm 0.006 ppm**  **0.003 ppm 0.0005 mg/kg/day**  **300 Immuno. 300 Immuno.** 

**10 Immuno. 30 Immuno.**  **Final 08/07**  **71**

**- 43**  **-2**

**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.**  **Oral Acute**  **Acute Int.**  **0. 3**  **mg/m3 0.2 mg/kg/day**  **0.2 mg/kg/day 3 Resp.**  **100 Develop.**

**66 Develop. Final**  **11/10 7440** 

**- 42**  **-8**

**BROMODICHLOR OMETHANE**  **Oral Acute**  **Chr. 0.04 mg/kg/day**  **0.02 mg/kg/day 1000 Hepatic**  **1000 Renal Final**  **12/89 75** 

**- 27**  **-4**

**BROMOFORM Oral**  **Acute Int.**  **Chr. 0.7 mg/kg/day**  **0.2 mg/kg/day 0.02 mg/kg/day**  **100 Hepatic 300 Hepatic**  **3000 Hepatic Final**  **09/05 75** 

**- 25**  **-2**

**BROMOMETHANE Inh.** 

**Oral Acute**  **Int. Chr.**  **Int. 0.05**  **ppm 0.05 ppm**  **0.005 ppm 0.003 mg/kg/day**  **100 Neurol. 100 Neurol.**  **100 Neurol. 100 Gastro.**  **Final 09/92**  **74**

**- 83**  **-9**

**2- BUTOXYETHANOL**  **( ETHYLENE GLYCOL MONOBUTYL ETHER**  **) Inh.** 

**Oral Acute**  **Int. Chr.**  **Acute Int.**  **6 ppm 3 ppm**  **0.2 ppm 0.4 mg/kg/day**  **0.07 mg/kg/day 9**  **9 3**  **90 1000**  **Hemato. Hemato.**  **Hemato. Hemato.**  **Hepatic Final**  **10/98 111** 

**- 76**  **-2**

**CADMIUM Inh.**  **Acute Chr.**  **0.00003 mg/m3 0.00001 mg/m3**  **300 Resp. 9 Renal**  **Final 09/12**  **7440**

**- 43**  **-9**

### July 2013 ATSDR Minimal Risk Levels Page 3 of 14 **Oral Int.**  **Chr. 0.0005 mg/kg/day**  **0.0001 mg/kg/day 100 Musculo.**  **3 Renal**

**CARBON DISULFIDE Inh.**  **Oral Chr.**  **Acute 0.3 ppm**  **0.01 mg/kg/day 30 Neurol.**  **300 Hepatic Final**  **08/96 75** 

**- 15**  **-0**

**CARBON TETRACHLORIDE Inh.** 

**Oral Int.**  **Chr. Acute**  **Int. 0.03 ppm**  **0.03 ppm 0.02 mg/kg/day**  **0.007 mg/kg/day 30 Hepatic**  **30 Hepatic 300 Hepatic**  **100 Hepatic Final**  **09/05 56** 

**- 23**  **-5**

**CESIUM Rad.**  **Acute Chr.**  **4 mSv 1 mSv/yr**  **3 Develop. 3 Other**  **Final 10/04**  **7440**

**- 46**  **-2**

**CHLORDANE Inh.** 

**Oral Int.**  **Chr. Acute**  **Int. Chr.**  **0.0002 mg/m3 0.00002 mg/m3**  **0.001 mg/kg/day 0.0006 mg/kg/day**  **0.0006 mg/kg/day 100 Hepatic**  **1000 Hepatic 1000 Develop.** 

**100 Hepatic 100 Hepatic**  **Final 05/94**  **57**

**- 74**  **-9**

**CHLORDECONE Oral**  **Acute Int.**  **Chr. 0.01 mg/kg/day**  **0.0005 mg/kg/day 0.0005 mg/kg/day**  **100 Neurol. 100 Renal**  **100 Renal Final**  **08/95 143** 

**- 50**  **-0**

**CHLORFENVINPHOS Oral**  **Acute Int.**  **Chr. 0.002 mg/kg/day**  **0.002 mg/kg/day 0.0007 mg/kg/day**  **1000 Neurol. 1000 Immuno.**  **1000 Neurol. Final**  **09/97 470** 

**- 90**  **-6**

**CHLORINE Inh.**  **Acute Int.**  **Chr. 0.0**  **6 ppm**  **0.002 ppm 0.00005 ppm**  **3 Resp. 90 Resp.**  **30 Resp. Final**  **11/10 7782** 

**- 50**  **-5**

**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 Chr.**  **0.1 mg/kg/day 0.09 mg/kg/day**  **300 Hepatic 300 Hepatic**  **Final 09/05**  **124**

**- 48**  **-1**

**CHLOROETHANE Inh.**  **Acute 15 ppm**  **100 Develop. Final**  **1 2/98**  **75**

**- 00**  **-3**

### July 2013 ATSDR Minimal Risk Levels Page 4 of 14 **CHLOROFORM Inh.** 

**Oral Acute**  **Int. C**  **hr. Acute**  **Int. Chr.**  **0.1 ppm 0.05 ppm**  **0.02 ppm 0.3 mg/kg/day**  **0.1 mg/kg/day 0.01 mg/kg/day**  **30 Hepatic 300 Hepatic**  **100 Hepatic 100 Hepatic**  **100 Hepatic 1000 Hepatic**  **Final 09/97**  **67**

**- 66**  **-3**

**CHLOROMETHANE Inh.**  **Acute Int.**  **Chr. 0.5 ppm**  **0.2 ppm 0.05 ppm**  **100 Neurol. 300 Hepatic**  **1000 Neurol. Final**  **12/98 74** 

**- 87**  **-3**

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

**- 48**  **-9**

**CHLORPYRIFOS Oral**  **Acute Int.**  **Chr. 0.003 mg/kg/day**  **0.003 mg/kg/day 0.001 mg/kg/day**  **10 Neurol. 10 Neurol.**  **100 Neurol. Final**  **09/97 2921** 

**- 88**  **-2**

**CHROMIUM(III) SOLUBLE PARTICULATES Inh.**  **Int. 0.0001 mg/m3**  **300 Resp. Final**  **09/12 16065** 

**- 83**  **-1**

**CHROMIUM(III) INSOL**

**. PARTICULATE**  **S Inh.**  **Int. 0.005 mg/m3**  **90 Resp. Final**  **09/12 16065** 

**- 83**  **-1**

**CHROMIUM( VI)**  **Oral Int.**  **Chr. 0.005 mg/kg/day**  **0.0009 mg/kg/day**  **100 H**  **emato. 100**  **G astro.**  **Final 09/12**  **18540**

**- 29**  **-9**

**CHROMIUM(VI), AEROSOL MISTS Inh.**  **Int. Chr.**  **0.000005 mg/m3 0.000005 mg/m3**  **100 Resp. 100 Resp.**  **Final 09/12**  **18540**

**- 29**  **-9**

**CHROMIUM(VI), PARTICULATES Inh.**  **Int. 0.0003 mg/m3**  **30 Resp. Final**  **09/12 18540** 

**- 29**  **-9**

**COBALT Inh.**  **Oral Rad.**  **Chr. Int.**  **Acute Chr.**  **0.0001 mg/m3 0.01 mg/kg/day**  **4 mSv 1 mSv/yr**  **10 Resp. 100 Hemato.**  **3 Develop. 3 Other**  **Final 10/04**  **7440**

**- 48**  **-4**

**COPPER Oral**  **Acute Int.**  **0.01 mg/kg/day 0.01 mg/kg/day**  **3 Gastro. 3 Gastro.**  **Final 10/04**  **7440**

**- 50**  **-8**

**CRESOLS Oral**  **Int. Chr.**  **0.1 mg/kg/day 0.1 mg/kg/day**  **100 Resp. 1000 Resp.**  **Final 09/08**  **1319**

**- 77**  **-3**

**CYANIDE, SODIUM Oral**  **Int. 0.05 mg/kg/day**  **100 Repro. Final**  **07/06 143** 

**- 33**  **-9**

**CYHALOTHRIN Oral**  **Acute Int.**  **0.01 mg/kg/day 0.01 mg/kg/day**  **100 Gastro. 100**  **Gastro. Final**  **09/03 68085** 

**- 85**  **-8**

### July 2013 ATSDR Minimal Risk Levels Page 5 of 14 **CYPERMETHRIN Oral**  **Acute 0.02 mg/kg/day**  **100 Neurol. Final**  **09/03 52315** 

**- 07**  **-8**

**DDT, P,P'**

**- Oral**  **Acute Int.**  **0.0005 mg/kg/day 0.0005 mg/kg/day**  **1000 Develop. 100 Hepatic**  **Final 09/02**  **50**

**- 29**  **-3**

**DIAZINON Inh.**  **Oral Int.**  **Acute Int.**  **Chr. 0.01 mg/m3**  **0.006 mg/kg/day 0.002 mg/kg/day**  **0.0007 mg/kg/day 30 Neurol.**  **100 Neurol. 100 Neurol.**  **100 Neurol. Final**  **09/08 333** 

**- 41**  **-5**

**1,2**

**- DIBROMO**  **-3- CHLOROPROPANE**  **Inh. Oral**  **Int. Int.**  **0.0002 ppm 0.002 mg/kg/day**  **100 Repro. 1000 Repro.**  **Final 09/92**  **96**

**- 12**  **-8**

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

**- 74**  **-2**

**1,2**

**- DICHLOROBENZENE**  **Oral Acute**  **Int. Chr.**  **0.7 mg/kg/day 0.6 mg/kg/day**  **0.3 mg/kg/day 100 Hepatic**  **100 Hepatic 100 Renal**  **Final 07/06**  **95**

**- 50**  **-1**

**1 ,3** 

**- DICHLOROBENZENE**  **Oral Acute**  **Int. 0.4 mg/kg/day**  **0.02 mg/kg/day 100 Hepatic**  **100 Endocr. Final**  **07/06 541** 

**- 73**  **-1**

**1,4**

**- DICHLOROBENZENE**  **Inh.**

**Oral Acute**  **Int. Chr.**  **Int. Chr.**  **2 ppm 0.2 ppm**  **0.01 ppm 0.07 mg/kg/day**  **0.07 mg/kg/day 10 Ocular**  **100 Hepatic**

**30 Resp. 100 Hepatic**  **100 Hepatic Final**  **07/06 106** 

**- 46**  **-7**

**1,2**

**- DICHLOROETHANE**  **Inh. Oral**  **Chr. Int.**  **0.6 ppm 0.2 mg/kg/day**  **90 Hepatic 300 Renal**  **Final 09/01**  **107**

**- 06**  **-2**

**1,1**

**- DICHLOROETHENE**  **Inh. Oral**  **Int. Chr.**  **0.02 ppm 0.009 mg/kg/day**  **100 Hepatic 1000 Hepatic**  **Final 05/94**  **75**

**- 35**  **-4**

**1,2**

**- DICHLOROETHENE, CIS** 

**- Oral**  **Acute Int.**  **1 mg/kg/day 0.3 mg/kg/day**  **100 Hemato. 100 Hemato.**  **Final 08/96**  **156**

**- 59**  **-2**

**1,2**

**- DICHLOROETHENE, TRANS** 

**- Inh.** 

**Oral Acute**  **Int. Int.**  **0.2 ppm**  **0.2 ppm 0.2 mg/kg/day**  **1000 Hepatic 1000 Hepatic** 

**100 Hepatic Final**  **08/96 156** 

**- 60**  **-5**

**2,4**

**- DICHLOROPHENOL**  **Oral Int.**  **0.003 mg/kg/day 100 Immuno.**  **Final 07/99**  **120**

**- 83**  **-2**

### July 2013 ATSDR Minimal Risk Levels Page 6 of 14 **1,2**

**- DICHLOROPROPANE**  **Inh.**

**Oral Acute**  **Int. Acute**  **Int. Chr.**  **0.05 ppm 0.007 ppm**  **0.1 mg/kg/day 0.07 mg/kg/day**  **0.09 mg/kg/day 1000 Resp.**  **1000 Resp. 1000 Neurol.**  **1000 Hemato. 1000 Hepatic**  **Final 12/89**  **78**

**- 87**  **-5**

**1,3**

**- DICHLOROPROPENE**  **Inh.**

**Oral Int.**  **Chr. Int.**  **Chr. 0.008 ppm**  **0.007 ppm 0.04 mg/kg/day**  **0.03 mg/kg/day 30 Resp.**  **30 Resp. 100 Gastro.**  **100 Gastro. Final**  **09/08 542** 

**- 75**  **-6**

**2,3**

**- DICHLOROPROPENE**  **Inh. Acute**  **0.002 ppm 90 Resp.**  **Final 09/08**  **78**

**- 88**  **-6**

**DICHLORVOS Inh.** 

**Oral Acute**  **Int. Chr.**  **Acute Int.**  **Chr. 0.002 ppm**  **0.0003 ppm 0.00006 ppm**  **0.004 mg/kg/day 0.003 mg/kg/day**  **0.0005 mg/kg/day 100 Neurol.**  **100 Neurol. 100 Neurol.**  **1000 Neurol. 10 Neurol.**  **100 Neurol. Final**  **09/97 62** 

**- 73**  **-7**

**DIELDRIN Oral**  **Int. Chr.**  **0.0001 mg/kg/day 0.00005 mg/kg/day**  **100 Neurol. 100 Hepatic**  **Final 09/02**  **60**

**- 57**  **-1**

**DI(2**

**- ETHYLHEXYL)PHTHALATE**  **Oral Int.**  **Chr. 0.1 mg/kg/day**  **0.06 mg/kg/day 100 Repro.**  **100 Repro. Final**  **09/02 117** 

**- 81**  **-7**

**DIETHYL PHTHALATE Oral**  **Acute Int.**  **7 mg/kg/day 6 mg/kg/day**  **300 Repro. 300 Hepatic**  **Final 06/95**  **84**

**- 66**  **-2**

**DIISOPROPYL METHYLPHOSPHONATE**

**(DIMP) Oral**  **Int. Chr.**  **0.8 mg/kg/day 0.6 mg/kg/day**  **100 Hemato. 100**  **Hemato. Final**  **10/98 1445** 

**- 75**  **-6**

**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**  **Int. 0.008 mg/kg/day**  **0.0005 mg/kg/day 100 Repro.**  **1000 Hemato. Final**  **06/95 99** 

**- 65**  **-0**

**4,6**

**- DINITRO**  **-O- CRESOL**  **Oral Acute**  **Int. 0.004 mg/kg/day**  **0.004 mg/kg/day 100 Neurol.**  **100 Neurol. Final**  **08/95 534** 

**- 52**  **-1**

### July 2013 ATSDR Minimal Risk Levels Page 7 of 14 **2,4**

**- DINITROPH**  **ENOL Oral**  **Acute 0.01 mg/kg/day**  **100 Body Wt. Final**  **08/95 51** 

**- 28**  **-5**

**2,4**

**- DINITROTOLUENE**  **Oral Acute**  **Int. Chr.**  **0.05 mg/kg/day 0.007**  **mg/kg/day 0.001 mg/kg/day**  **100 Neurol. 100 Hemato.**  **100 Hemato. Draft**  **04/13 121** 

**- 14**  **-2**

**2,6**

**- DINITROTOL**  **UENE Oral**  **Acute Int.**  **0.09 mg/kg/day**  **0.004 mg/kg/day 10**  **0 Hemato. 1000 Hemato.**  **Draft 04/13**  **606**

**- 20**  **-2**

**DI -N-**  **OCTYL PHTHALATE Oral**  **Acute Int.**  **3 mg/kg/day 0.4 mg/kg/day**  **300 Hepatic 100 Hepatic**  **Final 09/97**  **117**

**- 84**  **-0**

**1,4**

**- DIOXANE**  **Inh.**

**Oral Acute**  **Int. Chr.**  **Acute Int.**  **Chr. 2 ppm**  **0.2 ppm 0.03 ppm**  **5 mg/kg/day 0.5**  **mg/kg/day 0.1 mg/kg/day**  **30 Ocular 30 Resp.**  **300 Resp. 100 Develop** 

**. 100 Hepatic**  **100 Hepatic Final**  **04/12 123** 

**- 91**  **-1**

**DISULFOTON Inh.** 

**Oral Acute**  **Int. Acute**  **Int. Chr.**  **0.006 mg/m3 0.0002 mg/m3**  **0.001 mg/kg/day 0.00009 mg/kg/day**  **0.00006 mg/kg/day 30 Neurol.**  **30 Neurol. 100 Neurol.**  **100 Develop. 1000 Neurol.**  **Final 08/95**  **298**

**- 04**  **-4**

**ENDOS ULFAN**  **Oral Acute**  **Int. Chr.**  **0.007 mg/kg/day 0.005 mg/kg/day**  **0.005 mg/kg/day**  **100 Neurol. 100 Immuno.**  **100 Immuno. Draft**  **05/13 115** 

**- 29**  **-7**

**ENDRIN Oral**  **Int. Chr.**  **0.002 mg/kg/day 0.0003 mg/kg/day**  **100 Neurol. 100 Neurol.**  **Final 08/96**  **72**

**- 20**  **-8**

**ETHION Oral**  **Acute Int.**  **Chr. 0.002 mg/kg/day**  **0.002 mg/kg/day 0.0004 mg/kg/day**  **30 Neurol. 30 Neurol.**  **150 Neurol. Final**  **09/00 563** 

**- 12**  **-2**

**ETHYLBENZENE Inh.** 

**Oral Acute**  **Int. Chr.**  **Int. 5**  **ppm 2**  **ppm 0.**  **06 ppm**  **0. 4**  **mg/kg/day 30 Neurol.**  **30 Neurol. 300 Renal**  **3 0**  **Hepatic Final**  **11/10 100** 

**- 41**  **-4**

**ETHYLENE GLYCOL Inh.**  **Oral Acute**  **Acute Int.**  **2 mg/m3 0.8 mg/kg/day**  **0.8 mg/kg/day 10 Resp.**  **100 Develop. 100 Develop.**  **Final 11/10**  **107**

**- 21**  **-1**

### July 2013 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.** 

**Oral Acute**  **Int. Chr.**  **Int. Chr.**  **0.04 ppm 0.03 ppm**  **0.008 ppm 0.3 mg/kg/day**  **0.2 mg/kg/day 9 Resp.**  **30 Resp. 30 Resp.**  **100 Gastro. 100 Gastro.**  **Final 07/99**  **50**

**- 00**  **-0**

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

**- 30**  **-2**

**GUTHION (AZINPHOS**

**- METHYL)**  **Inh.**

**Oral Acute**  **Int. Chr.**  **Acute Int.**  **Chr. 0.02 mg/m3**  **0.01 mg/m3 0.01 mg/m3**  **0.01 mg/kg/day 0.003 mg/kg/day**  **0.003 mg/kg/day 30 Neurol.**  **30 Neurol. 30 Neurol.**  **100 Neurol. 100 Neurol.**  **100 Neurol. Final**  **09/08 86** 

**- 50**  **-0**

**HEPTACH LOR**  **Oral Acute**  **Int. 0.0006 mg/kg/day**  **0.0001 mg/kg/day 3000 Repro.**  **300 Immuno. Final**  **08/07 76** 

**- 44**  **-8**

**HEXACHLOROBENZENE Oral**  **Acute Int.**  **Chr. 0.008 mg/kg/day**  **0.0001 mg/kg/day 0.00007**  **mg/kg/day 300 Develop.**  **90 Repro. 300 Hepatic**  **Draft 06/13**  **118**

**- 74**  **-1**

**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**  **Int. 0.05 mg/kg/day**  **0.0006 mg/kg/day 100 Neurol.**  **300 Hepatic Final**  **09/05 319** 

**- 85**  **-7**

**GAMMA**

**- HEXACHLOROCYCLOHEXANE**  **Oral Acute**  **Int. 0.003 mg/kg/day**  **0.00001 mg/kg/day 300 Develop.**  **1000 Immuno. Final**  **09/05 58** 

**- 89**  **-9**

### July 2013 ATSDR Minimal Risk Levels Page 9 of 14 **HEXACHLOROCYCLOPENTADIENE Inh.** 

**Oral Int.**  **Chr. Int.**  **0.01 ppm 0.0002 ppm**  **0.1 mg/kg/day 30 Resp.**  **90 Resp. 100 Renal**  **Final 07/99**  **77**

**- 47**  **-4**

**HEXACHLOROETHANE Inh.** 

**Oral Acute**  **I nt.**  **Acute Int.**  **6 ppm 6 ppm**  **1 mg/kg/day 0.01 mg/kg/day**  **30 Neurol. 30 Neurol.**  **100 Hepatic 100 Hepatic**  **Final 09/97**  **67**

**- 72**  **-1**

**HEXAMETHYLENE DIISOCYANATE Inh.**  **Int. Chr.**  **0.00003 ppm 0.00001 ppm**  **30 Resp. 90 Resp.**  **Final 10/98**  **822**

**- 06**  **-0**

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

**- 54**  **-3**

**HMX ( CYCLOTETRAMETHYLENE**  **TETRANITRAMINE) Oral**  **Acute Int.**  **0.1 mg/kg/day 0.05 mg/kg/day**  **1000 Neurol. 1000 Hepatic**  **Final 09/97**  **2691**

**- 41**  **-0**

**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 Int.**  **0.07 ppm 0.02 ppm**  **27 Resp. 30 Resp.**  **Final 07/06**  **7783**

**- 06** 

**- 4** 

**IODIDE Oral**  **Acute Chr.**  **0.01 mg/kg/day 0.01 mg/kg/day**  **1 Endocr. 1 Endocr.**  **Final 10/04**  **7553**

**- 56** 

**- 2** 

**IONIZING RADIATION, N.O.S. Rad.**  **Acute Chr.**  **4 mSv 1 mSv/yr**  **3 Neurol. 3 Other**  **Final 09/99**  **HZ1800**

**- 45** 

**- T** 

**ISOPHORONE Oral**  **Int. Chr.**  **3 mg/kg/day 0.2 mg/kg/day**  **100 Other 1000 Hepatic**  **Final 12/89**  **78**

**- 59** 

**- 1** 

**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** 

**KE ROSENE**  **Inh. Int.**  **0.01 mg/m3 1000 Hepatic**  **Final 06/95**  **8008**

**- 20** 

**- 6** 

### July 2013 ATSDR Minimal Risk Levels Page 10 of 14 **MALATHION Inh.** 

**Oral Acute**  **Int. Int.**  **Chr. 0.2 mg/m3**  **0.02 mg/m3 0.02 mg/kg/day**  **0.02 mg/kg/day 100 Neurol.**  **1000 Resp. 10 Neurol.**  **100 Neurol. Final**  **09/03 121** 

**- 75**  **-5**

**MANGANESE, RESPIRABLE Inh.**  **Chr. 0.3**  **u g/m3**  **1 00 Neurol.**  **Final 09**  **/ 12**  **7439**

**- 96**  **-5**

**MERCURIC CHLORIDE Oral**  **Acute 0.007 mg/kg/day Int. 0.002 mg/kg/day**  **100 Renal Final 100**  **Renal 03/99**  **7487**

**- 94**  **-7**

**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. Draft**  **09/00 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.** 

**Oral Acute 0.6 ppm**  **Int. 0.3 ppm Chr. 0.3 ppm**  **Acute 0.2 mg/kg/day Ch**  **r. 0.06 mg/kg/day 100 Neurol. Final**  **90 Hepatic 30 Hepatic**  **100 Neurol. 100 Hepatic**  **09/00 75** 

**- 09**  **-2**

**4,4'**

**- METHYLENEDIANILINE**  **Oral Acute 0.2 mg/kg/day**  **Int. 0.08 mg/kg/day 300 Hepatic Final**  **100 Hepatic 10/98**  **101**

**- 77**  **-9**

**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 Chr. 0.0003 mg/kg/day**  **300 Neurol. Final 100 Hemato.**  **09/01 298** 

**- 00**  **-0**

**METHYL -T-**  **BUTYL ETHER Inh.** 

**Oral Acute 2 ppm**  **Int. 0.7 ppm Chr. 0.7 ppm**  **Acute 0.4 mg/kg/day Int. 0.3 mg/kg/day**  **100 Neurol. Final 100 Neurol.**  **100 Renal 100 Neurol.**  **300 Hepatic 08/96**  **1634**

**- 04**  **-4**

**MIREX Oral**  **Chr. 0.0008 mg/kg/day 100 Hepatic Final**  **08/95 2385** 

**- 85**  **-5**

**MONOMETHYLARSONIC ACID**

**(MMA) Oral**  **Int. 0.1 mg/kg/day Chr. 0.01 mg/kg/day**  **100 Gastro. Final 100 Renal**  **08/07 124** 

**- 58**  **-3**

### July 2013 ATSDR Minimal Risk Levels Page 11 of 14 **NAPHTHALENE Inh.**  **Oral Chr.**  **Acute Int.**  **0.0007 ppm 0.6 mg/kg/day**  **0.6 mg/kg/day 300 Resp.**  **90 Neurol. 90 Neurol.**  **Final 09/05**  **91**

**- 20**  **-3**

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

**- 64**  **-7**

**NICKEL Inh.**  **Int. Chr.**  **0.0002 mg/m3 0.00009 mg/m3**  **30 Resp. 30 Resp.**  **Final 09/05**  **7440**

**- 02**  **-0**

**2,3,4,7,8**

**- PENTACHLORODIBENZOFURAN**  **Oral Acute**  **Int. 0.001 ug/kg/day**  **0.00003 ug/kg/day 3000 Immuno.**  **3000 Hepatic Final**  **05/94 57117** 

**- 31**  **-4**

**PENTACHLOROPHENOL Oral**  **Acute Int.**  **Chr. 0.005 mg/kg/day**  **0.001 mg/kg/day 0.001 mg/kg/day**  **1000 Develop. 1000 Repro.**  **1000 Endocr. Final**  **09/01 87** 

**- 86**  **-5**

**PERCHLORATES Oral**  **Chr. 0.0007 mg/kg/day**  **10 Endocr. Final**  **08/08 7778** 

**- 74**  **-7**

**PERMETHRIN Oral**  **Acute Int.**  **0.3 mg/kg/day 0.2 mg/kg/day**  **100 Neurol. 100 Neurol.**  **Final 09/03**  **52645**

**- 53**  **-1**

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

**- 95**  **-2**

**PHOSPHORUS, WHITE Inh.**  **Oral Acute**  **Int. 0.02 mg/m3**  **0.0002 mg/kg/day 30 Resp.**  **100 Repro. Final**  **09/97 7723** 

**- 14**  **-0**

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

**- 01**  **-8**

**POLYBROMINATED DIPHENYL ETHERS (PBDEs), LOWER BROMINATED**  **Inh Oral**  **Int. Acute**  **Int. 0.006 mg/m3**  **0.03 mg/kg/day 0.007 mg/kg/day**  **90 Endocr. 30 Endocr.**  **300 Hepatic Final**  **10/04 32534** 

**- 81**  **-9 32536** 

**- 52**  **-0**

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

**- 19**  **-5**

**POLYCHLORINATED BIPHENYLS (PCBs)**

**(Aroclor 1254) Oral**  **Int. Chr.**  **0.03 ug/kg/day 0.02 ug/kg/day**  **300 Neurol. 300 Immuno.**  **Final 11/00**  **11097**

**- 69**  **-1**

**PROPYLENE GLYCOL Inh.**  **Int. 0.009 ppm**  **1000 Resp. Final**  **09/97 57** 

**- 55**  **-6**

**PROPYLENE GLYCOL DINITRATE**  **Inh. Acute**  **Int. Chr.**  **0.003 ppm 0.00004 ppm**  **0.00004 ppm 10**  **1000 1000**  **Neurol. Hemato.**  **Hemato. Final**  **06/95 6423** 

**- 43**  **-4**

### July 2013 ATSDR Minimal Risk Levels Page 12 of 14 **RDX (C yclonite**  **) Oral**  **Acute Int.**  **Chr. 0.2 mg/kg/day**  **0.1 mg/kg/day 0.1 mg/kg/day**  **30 Neurol. 30 Neurol.**  **30 Neurol. Final**  **01/12 121** 

**- 82**  **-4**

**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.** 

**Oral Acute**  **Chr. Acute**  **5 ppm**  **0.2 ppm 0.1 mg/kg/day**  **10 Neurol. 3**  **0 Neurol. 1000 Neurol.**  **Final 11/10**  **100**

**- 42**  **-5**

**SULFUR DIOXIDE Inh.**  **Acute 0.01 ppm**  **9 Resp. Final**  **12/98 7446** 

**- 09**  **-5**

**SULFUR MUSTARD Inh.** 

**Oral Acute**  **Int. Acute**  **Int. 0.0007 mg/m3**  **0.00002 mg/m3 0.5 ug/kg/day**  **0.07 ug/kg/day 30 Ocular**  **30 Ocular 1000 Develop.** 

**300 Gastro. Final**  **09/03 505** 

**- 60**  **-2**

**2,3,7,8**

**- TETRACHLORODIBENZO**  **-P- DIOXIN Oral**  **Acute Int.**  **Chr. 0.0002 ug/kg/day**  **0.00002 ug/kg/day 0.000001 ug/kg/day**  **21 Immuno. 30 Lymphor.**  **90 Develop. Final**  **12/98 1746** 

**- 01**  **-6**

**1,1,2,2**

**- TETRACHLOROETHANE**  **Oral Int.**  **0.5 mg/kg/day 100 Hepatic**  **Final 09/08**  **79**

**- 34**  **-5**

**TETRACHLOROETHYLENE Inh.** 

**O ral**  **Acute Chr.**  **Acute 0.2 ppm**  **0.04 ppm 0.05 mg/kg/day**  **10 Neurol. 100 Neurol.**  **100 Develop. Final**  **09/97 127** 

**- 18**  **-4**

**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.**  **Chr. 0.0003 mg/kg/day**  **0.0003 mg/kg/day 100**  **Immuno. 100**  **Immuno. Final**  **09/05 56** 

**- 35**  **-9**

**TITANIUM TETRACHLORIDE Inh.**  **Int. Chr.**  **0.01 mg/m3 0.0001 mg/m3**  **90 Resp. 90 Resp.**  **Final 09/97**  **7550**

**- 45**  **-0**

### July 2013 ATSDR Minimal Risk Levels Page 13 of 14 **TOLUENE Inh.** 

**Oral Acute**  **Chr. Acute**  **Int. 1 ppm**  **0.08 ppm 0.8 mg/kg/day**  **0.02 mg/kg/day 10 Neurol. Final 09/00**  **100 Neurol. 300 Neurol.**  **300 Neurol. 108** 

**- 88**  **-3**

**T OXAPHENE**  **Oral Acute**  **Int. 0.05 mg/kg/day**  **0.00 2**  **mg/kg/day 100**  **Neurol. Draft**  **09/ 10**  **1 00**  **Immuno. 8001** 

**- 35**  **-2**

**TRIBUTYL PHOSPHATE (TnBP)**  **Oral Acute**  **Int. Chr.**  **1.1 mg/kg /day**  **0.08 mg/kg/day**  **0.08 mg/kg/day**  **100 Body Wt. Final 09 /12**  **100 Renal 100 Renal**  **126**

**- 73**  **-8**

**1,2,4**

**- TRICHLOROBENZENE**  **Oral Int.**  **Chr. 0.1 mg/kg/day**  **0.1 mg/kg/day 100 Hepatic Draft 9/10**  **100 Hepatic 120**  **-82-1**

**1,1,1**

**- TRICHLOROETHANE**  **Inh.**

**Oral Acute**  **Int. Int.**  **2 ppm 0.7 ppm**  **20 mg/kg/day 100 Neurol. Final 07/06**  **100 Neurol. 100 Body Wt.**  **71**

**- 55**  **-6**

**1,1,2**

**- TRICHLOROETHANE**  **Oral Acute**  **Int. 0.3 mg/kg/day**  **0.04 mg/kg/day 100 Neurol. Final 12/89**  **100 Hepatic 79** 

**- 00**  **-5**

**TRICHLOROETHYLE NE**  **Inh. Chr.**  **0.0004 ppm**  **10 Develop. Addendum 01/13**  **100 Immuno. 79** 

**- 01**  **-6**

**Oral Chr.**  **0.0005 mg/kg/day 10 De**  **velop. 100 Immuno.**  **1000 Immuno.**

**1,2,3**

**- TRICHLOROPROPANE**  **Inh. Oral**  **Acute Int.**  **0.0003 ppm 0.08 mg/kg/day**  **100 Resp. Final 09/92 100 Hepatic**  **96**

**- 18**  **-4**

**TRICRESYL PHOSPHATE (TCP)**  **Oral Int.**  **Chr. 0.04 mg/kg/day**  **0.02 mg/kg/day 100 Reprod. Final 09/12**  **100 Reprod. 1330** 

**- 78**  **-5**

**2,4,6**

**- TRINITROTOLUENE**  **Oral Int.**  **0.0005 mg/kg/day 1000 Hepatic Final 06/95**  **118**

**- 96**  **-7**

**TRIS(2**

**- BUTOXYETHYL) PHOSPHATE**  **(TBEP) Oral**  **Acute Int.**  **4.8 mg/kg/day 0.09**  **mg/kg/day 100 Body Wt. Final 09**  **/12 100 Hepatic**  **78**

**- 51**  **-3**

**TRIS(2**

**- CHLOROETHYL) PHOSPHATE**  **(TCEP) Oral**  **Int. Chr.**  **0.6 mg/kg/day 0.2**  **mg/kg/da y**  **100 Neurol. 100 Renal**  **Final 09**  **/12 115** 

**- 96**  **-8**

**TRIS(1,3**

**- DICHLORO**  **-2- PROPYL)**  **PHOSPHATE (TDCP) Oral**  **Int. Chr.**  **0.05 mg/kg/day 0.02 mg/kg/day**  **100 Renal 100 Renal**  **Final 09**  **/12 13674** 

**- 87**  **-8**

### July 2013 ATSDR Minimal Risk Levels Page 14 of 14 **URANIUM, SOLUBLE SALTS Inh.** 

**Oral Int.**  **Chr. Acute**  **Int. 0.0001 mg/m3**  **0.00004 mg/m3 0.002 mg/kg/day**  **0.0002 mg/kg/day 300 Renal**  **100 Renal 100 Develop.**  **300 Renal Final**  **02/13 7440** 

**- 61**  **-1**

**URANIUM, INSOLUBLE COMPOUNDS Inh.**  **Int. Chr.**  **0.002 mg/m3 0.0008 mg/m3**  **100 Renal 1000 Resp.**  **Final 02/13**  **7440**

**- 61**  **-1**

**VAN ADIUM**  **Inh.**

**Oral Acute 0.0008 mg/m3**  **Chr. 0.0001 mg/m3 Int. 0.01**  **mg/kg/day 90 Resp.**  **30 Resp. 10 Hemato.**  **Final 09**  **/12 7440** 

**- 62**  **-2**

**VINYL ACETATE Inh.**  **Int. 0.01 ppm 100 Resp.**  **Final 07/92**  **108**

**- 05**  **-4**

**VINYL CHLORIDE Inh.** 

**Oral Acute 0.5 ppm**  **Int. 0.03 ppm Chr. 0.003 mg/kg/day**  **30 Develop. Final 30 Hepatic**  **30 Hepatic 07/06**  **75**

**- 01**  **-4**

**XYLENES, MIXED Inh.** 

**Ora l**  **Acute 2 ppm Int. 0.6 ppm**  **Chr. 0.05 ppm Acute 1 mg/kg/day**  **Int. 0.4 mg/kg/day Chr. 0.2 mg/kg/day**  **30 Neurol. Final 90 Neurol.**  **300 Neurol. 100 Neuro**  **l. 1000 Neurol.**  **1000 Neurol. 08/07**  **1330**

**- 20**  **-7**

**ZINC Oral**  **Int. 0.3 mg/kg/day Chr. 0.3 mg/kg/day**  **3 Hemato. Final 3 Hemato.**  **09/05 7440** 

**- 66**  **-6**

**______________________________________________________________________________________________________________**
**Total number of MRLs: 401**  **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 Pro files,**  **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.**