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Registry of Toxic Effects of Chemical Substances (RTECS)

Hafnium

RTECS #

MG4600000

CAS #

7440-58-6

Updated

September 2013

Molecular Weight

178.49

Molecular Formula

Hf

Synonyms

Hafnium (ACGIH:OSHA)

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 0.5 mg/m3DTLVS* TLV/BEI,2013
TOXICOLOGY REVIEWIHFMAU -,-,1954

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 0.5 mg/m3DTLVS* 3,123,1971
Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV;
Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV
Occupational Exposure Limit-AUSTRALIAtime-weighted average 0.5 mg/m3, JUL2008
Occupational Exposure Limit-AUSTRIAMAK-TMW 0.5 mg/m3;KZW 5 mg/m3, inhal, 2007
Occupational Exposure Limit-BELGIUMtime-weighted average 0.5 mg/m3, MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 0.5 mg/m3 (dust), MAY2011
Occupational Exposure Limit-FINLANDtime-weighted average 0.5 mg/m3, NOV2011
Occupational Exposure Limit-FRANCEVME 0.5 mg/m3, FEB2006
Occupational Exposure Limit-ICELANDtime-weighted average 0.5 mg/m3 (dust), NOV2011
Occupational Exposure Limit-KOREAtime-weighted average 0.5 mg/m3, 2006
Occupational Exposure Limit-MEXICOtime-weighted average 0.5 mg(Hf)/m3;short term exposure limit 1.5 mg(Hf)/m3 (metal), 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 0.5 mg/m3, JAN2002
Occupational Exposure Limit-PERUtime-weighted average 0,5 mg/m3, JUL2005
Occupational Exposure Limit-POLANDMAC(time-weighted average) 0.5 mg/m3, JAN1999
Occupational Exposure Limit-SWITZERLANDMAK-week 0.5 mg/m3, inhal, JAN2011
Occupational Exposure Limit-THE NETHERLANDSMAC-TGG 0.5 mg/m3, 2003
Occupational Exposure Limit-THE PHILIPPINEStime-weighted average 0.5 mg/m3, JAN1993
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 0.5 mg/m3CFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors)8H time-weighted average 0.5 mg/m3CFRGBR 41,50-204.50,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 0.5 mg/m3CFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 0.5 mg/m3CFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO HAFNIUM-air10H time-weighted average 0.5 mg/m3NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code 35755; Number of Industries 1; Total Number of Facilities 3; Number of Occupations 7; Total Number of Employees Exposed 1004; Total Number of Female Employees Exposed 3
National Occupational Hazard Survey 1974Hazard Code 35755; Number of Industries 16; Total Number of Facilities 331; Number of Occupations 16; Total Number of Employees Exposed 3335

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
OSHA ANALYTICAL METHOD #ID121
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