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7439-98-7

7439-98-7 structure
7439-98-7 structure

Name molybdenum atom
Synonyms Molybdenum powder
Molybdenum, elemental
Molybdenum metal
MFCD00003465
Molybdenum
EINECS 231-107-2
Density 10.3 g/mL at 25 °C(lit.)
Boiling Point 4825 °C
Melting Point 2622 °C
Molecular Formula Mo
Molecular Weight 95.940
Flash Point -23 °C
Exact Mass 97.905411
Index of Refraction 2.81 (740 nm)
Stability Stable. Powder is flammable.
Water Solubility H2O: soluble

CHEMICAL IDENTIFICATION

RTECS NUMBER :
QA4680000
CHEMICAL NAME :
Molybdenum
CAS REGISTRY NUMBER :
7439-98-7
LAST UPDATED :
199710
DATA ITEMS CITED :
19
MOLECULAR FORMULA :
Mo
MOLECULAR WEIGHT :
95.94
WISWESSER LINE NOTATION :
MO

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intratracheal
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
70 mg/kg
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - fibrosis, focal (pneumoconiosis)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
6050 ug/kg
SEX/DURATION :
female 35 week(s) pre-mating
TOXIC EFFECTS :
Reproductive - Fertility - pre-implantation mortality (e.g. reduction in number of implants per female; total number of implants per corpora lutea) Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants) Reproductive - Specific Developmental Abnormalities - musculoskeletal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
5800 ug/kg
SEX/DURATION :
female 30 week(s) pre-mating female 1-20 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
448 mg/kg
SEX/DURATION :
multigenerations
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Effects on Embryo or Fetus - fetal death

MUTATION DATA

TEST SYSTEM :
Rodent - rat
DOSE/DURATION :
19500 ug/m3
REFERENCE :
GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 24(9),33,1980 *** REVIEWS *** TOXICOLOGY REVIEW JAVMA4 Journal of the American Veterinary Medical Association. (American Veterinary Medical Assoc., 930 N. Meacham Rd., Schaumburg, IL 60196) V.48- 1915- Volume(issue)/page/year: 164,277,1974 TOXICOLOGY REVIEW FOREAE Food Research. (Champaign, IL) V.1-25, 1936-60. For publisher information, see JFDSAZ. Volume(issue)/page/year: 7,313,1942 TOXICOLOGY REVIEW KOTTAM Kogai to Taisaku. Journal of Environmental Pollution Control. (Kogai Taisaku Gijutsu Dokokai, Shuwa-Akasaka Bldg., 9-1-244, Akasaka, Minato-ku, Tokyo 107, Japan) V.1- 1965- Volume(issue)/page/year: 11,1300,1975 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 48625 No. of Facilities: 935 (estimated) No. of Industries: 17 No. of Occupations: 29 No. of Employees: 6097 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5919 No. of Facilities: 29 (estimated) No. of Industries: 2 No. of Occupations: 6 No. of Employees: 2426 (estimated) No. of Female Employees: 1114 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5984 No. of Facilities: 187 (estimated) No. of Industries: 5 No. of Occupations: 11 No. of Employees: 4474 (estimated) No. of Female Employees: 2432 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 48625 No. of Facilities: 15780 (estimated) No. of Industries: 173 No. of Occupations: 88 No. of Employees: 238124 (estimated) No. of Female Employees: 4166 (estimated)
Personal Protective Equipment Eyeshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
Hazard Codes Xi:Irritant
Risk Phrases R36/37/38
Safety Phrases S26-S36/37/39-S16-S9-S62-S61-S36/37
RIDADR UN 3264 8/PG 3
WGK Germany 3
RTECS QA4680000
Packaging Group III
Hazard Class 4.1