methylmercury(1+)

MOLECULAR FORMULA :

C-H3-Hg

MOLECULAR WEIGHT :

215.63

WISWESSER LINE NOTATION :

1-HG-

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

56 mg/kg/14D-I

TOXIC EFFECTS :

Brain and Coverings - other degenerative changes Nutritional and Gross Metabolic - weight loss or decreased weight gain Biochemical - Metabolism (Intermediary) - other proteins

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

37087 ug/kg/12W-C

TOXIC EFFECTS :

Endocrine - changes in thymus weight Blood - changes in erythrocyte (RBC) count Immunological Including Allergic - decrease in cellular immune response

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Mammal - cat

DOSE/DURATION :

40404 ug/kg/57W-C

TOXIC EFFECTS :

Brain and Coverings - other degenerative changes Behavioral - altered sleep time (including change in righting reflex) Behavioral - ataxia

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

1350 ug/kg

SEX/DURATION :

female 7 day(s) after conception

TOXIC EFFECTS :

Reproductive - Effects on Newborn - delayed effects

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

59 mg/kg

SEX/DURATION :

female 2-22 day(s) after conception lactating female 2 day(s) post-birth

TOXIC EFFECTS :

Reproductive - Specific Developmental Abnormalities - Central Nervous System Reproductive - Effects on Newborn - viability index (e.g., # alive at day 4 per # born alive)

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

8550 mg/kg

SEX/DURATION :

female 14 day(s) pre-mating - 21 day(s) post-birth

TOXIC EFFECTS :

Reproductive - Effects on Newborn - behavioral

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

22 mg/kg

SEX/DURATION :

female 1-21 day(s) after conception

TOXIC EFFECTS :

Reproductive - Effects on Newborn - live birth index (measured after birth) Reproductive - Effects on Newborn - weaning or lactation index (e.g., # alive at weaning per # alive at day 4)

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Unreported

DOSE :

5 mg/kg

SEX/DURATION :

female 15 day(s) after conception

TOXIC EFFECTS :

Reproductive - Effects on Newborn - behavioral

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Subcutaneous

DOSE :

5375 mg/kg

SEX/DURATION :

female 12 day(s) after conception

TOXIC EFFECTS :

Reproductive - Specific Developmental Abnormalities - craniofacial (including nose and tongue)

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Subcutaneous

DOSE :

6469 mg/kg

SEX/DURATION :

female 9 day(s) after conception

TOXIC EFFECTS :

Reproductive - Effects on Newborn - behavioral

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Intravenous

DOSE :

2700 ug/kg

SEX/DURATION :

female 1 day(s) after conception

TOXIC EFFECTS :

Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus)

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Unreported

DOSE :

10 mg/kg

SEX/DURATION :

female 12 day(s) after conception

TOXIC EFFECTS :

Reproductive - Specific Developmental Abnormalities - craniofacial (including nose and tongue) Reproductive - Effects on Embryo or Fetus - other effects to embryo

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

20 mg/kg

SEX/DURATION :

female 17 week(s) pre-mating female 1-24 week(s) after conception

TOXIC EFFECTS :

Reproductive - Fertility - abortion Reproductive - Effects on Newborn - stillbirth

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

DOSE :

9800 ug/kg

SEX/DURATION :

male 20 week(s) pre-mating

TOXIC EFFECTS :

Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count)

TYPE OF TEST :

Cytogenetic analysis

MUTATION DATA

TYPE OF TEST :

Mutation test systems - not otherwise specified

TEST SYSTEM :

Mammal - species unspecified Kidney

REFERENCE :

TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 94,473,1988 *** REVIEWS *** ACGIH TLV-TWA 0.01 mg(Hg)/m3; STEL 0.03 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 0.001 ppm (0.01 mg(Hg)/m3) DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,22,1973 OSHA PEL (Gen Indu):8H TWA 0.01 mg(Hg)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 0.01 mg(Hg)/m3 (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 0.01 mg(Hg)/m3 (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 0.01 mg(Hg)/m3 (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 0.01 mg(Hg)/m3;STEL 0.03 mg(Hg)/m3;Skin JAN 1993 OEL-BELGIUM:TWA 0.01 mg(Hg)/m3;STEL 0.03 mg(Hg)/m3;Skin JAN 1993 OEL-DENMARK:TWA 0.01 mg(Hg)/m3;Skin JAN 1993 OEL-FINLAND:TWA 0.01 mg(Hg)/m3;Skin JAN 1993 OEL-FRANCE:TWA 0.01 mg(Hg)/m3;Skin JAN 1993 OEL-GERMANY:TWA 0.01 mg/m3;Skin JAN 1993 OEL-THE NETHERLANDS:TWA 0.01 mg(Hg)/m3;STEL 0.02 mg(Hg)/m3;Skin JAN 1993 OEL-THE PHILIPPINES:TWA 0.01 mg(Hg)/m3 JAN 1993 OEL-SWEDEN:TWA 0.01 mg(Hg)/m3;Skin JAN 1993 OEL-SWITZERLAND:TWA 0.01 mg/m3;Skin JAN 1993 OEL-THAILAND:TWA 0.01 mg(Hg)/m3;STEL 0.04 mg(Hg)/m3 JAN 1993 OEL-TURKEY:TWA 0.01 mg(Hg)/m3;Skin JAN 1993 OEL-UNITED KINGDOM:TWA 0.01 mg(Hg)/m3;STEL 0.03 mg(Hg)/m3;Skin JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO MERCURY, ORGANO-air:TWA 0.01 mg/m3;STEL 0.03 mg/m3 (Sk) REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992