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Registry of Toxic Effects of Chemical Substances (RTECS)

Tantalum

RTECS #

WW5505000

CAS #

7440-25-7

Updated

July 2013

Molecular Weight

180.95

Molecular Formula

Ta

Synonyms

Tantalum, metal (ACGIH:OSHA)
Tantalum-181

Tumorigenic Data and References

Route/OrganismDoseEffectReference
implant/rat lowest published toxic dose: 3760 mg/kgTumorigenic: Equivocal tumorigenic agent by RTECS criteria

Tumorigenic: Tumors at site of application		CNREA8 16,439,1956

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
intratracheal/rat lowest published toxic dose: 250 mg/kgLung, Thorax, or Respiration: Structural or functional change in trachea or bronchi

Lung, Thorax, or Respiration: Emphysema		VCVN5* -,147,1993
oral/mouse lethal dose (50 percent kill): 595 mg/kgVCVN5* -,147,1993

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 5 mg/m3DTLVS* 3,243,1971
Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV;
Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV
Occupational Exposure Limit-ARAB Republic of Egypttime-weighted average 0.1 mg/m3, JAN1993
Occupational Exposure Limit-AUSTRALIAtime-weighted average 5 mg/m3 (dust), JUL2008
Occupational Exposure Limit-AUSTRIAMAK-TMW 5 mg/m3, inhal, 2007
Occupational Exposure Limit-BELGIUMtime-weighted average 5 mg/m3, MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 5 mg(Ta)/m3, MAY2011
Occupational Exposure Limit-FRANCEVME 5 mg/m3, FEB2006
Occupational Exposure Limit-GERMANYMAK 1.5 mg/m3, resp, 2011
Occupational Exposure Limit-GERMANYMAK 4 mg/m3, inhal, 2011
Occupational Exposure Limit-ICELANDtime-weighted average 5 mg/m3, dust, NOV2011
Occupational Exposure Limit-MEXICOtime-weighted average 5 mg/m3;short term exposure limit 10 mg/m3, 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 5 mg/m3, JAN2002
Occupational Exposure Limit-PERUtime-weighted average 5 mg/m3, JUL2005
Occupational Exposure Limit-POLANDMAC(time-weighted average) 5 mg/m3, JAN1999
Occupational Exposure Limit-RUSSIAtime-weighted average 10 mg/m3, JUN2003
Occupational Exposure Limit-SWITZERLANDMAK-week 5 mg/m3, inhal, JAN2011
Occupational Exposure Limit-THE NETHERLANDSMAC-TGG 5 mg/m3, 2003
Occupational Exposure Limit-THE PHILIPPINEStime-weighted average 5 mg/m3, JAN1993
Occupational Exposure Limit-UNITED KINGDOMtime-weighted average 5 mg/m3;short term exposure limit 10 mg/m3, OCT2007
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 5 mg/m3CFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors)8H time-weighted average 5 mg/m3CFRGBR 41,50-204.50,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 5 mg/m3CFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 5 mg/m3CFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO TANTALUM, metal/oxide dust-airtime-weighted average 5 mg/m3;short term exposure limit 10 mg/m3NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code X2923; Number of Industries 1; Total Number of Facilities 26; Number of Occupations 3; Total Number of Employees Exposed 518; Total Number of Female Employees Exposed 155
National Occupational Exposure Survey 1983Hazard Code X4238; Number of Industries 1; Total Number of Facilities 2; Number of Occupations 1; Total Number of Employees Exposed 35; Total Number of Female Employees Exposed 21
National Occupational Exposure Survey 1983Hazard Code X5917; Number of Industries 1; Total Number of Facilities 3; Number of Occupations 1; Total Number of Employees Exposed 400; Total Number of Female Employees Exposed 400
National Occupational Exposure Survey 1983Hazard Code 71095; Number of Industries 13; Total Number of Facilities 275; Number of Occupations 13; Total Number of Employees Exposed 7063; Total Number of Female Employees Exposed 1255
National Occupational Hazard Survey 1974Hazard Code 71095; Number of Industries 2; Total Number of Facilities 28; Number of Occupations 5; Total Number of Employees Exposed 597

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001

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