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Registry of Toxic Effects of Chemical Substances (RTECS)

Magnesium(II) carbonate (1:1)

RTECS #

OM2470000

CAS #

546-93-0; 1784-39-0; 183480-27-5

Updated

July 2013

Molecular Weight

84.32

Molecular Formula

CO3·Mg

Synonyms

Apolda
C.I. 77713
Carbonate magnesium
Carbonic acid, magnesium salt
DCI light magnesium carbonate
Destab
Gold Star (carbonate)
GP 20 (carbonate)
Hydromagnesite
Kimboshi
MA 70 (carbonate)
Magmaster
Magnesite
Magnesite (ACGIH:OSHA)
Stan-mag magnesium carbonate

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/rat lowest published toxic concentration: 76 mg/m3/4HCardiac: Pulse rate increased without fall in BP

Liver: Liver function tests impaired

Kidney, Ureter, and Bladder: Other changes in urine composition		TOVEFN (2),29,1997
inhalation/rat lowest published toxic concentration: 76 mg/m3/4HBlood: Changes in serum composition (e.g. TP, bilirubin, cholesterol)

Biochemical: Enzyme inhibition, induction, or change in blood or tissue levels: Phosphatases		TOVEFN (2),29,1997
intraperitoneal/mouse lethal dose (50 percent kill): 1033 mg/kgTOVEFN (2),29,1997
oral/mouse lethal dose (50 percent kill): 7000 mg/kgTOVEFN (2),29,1997
oral/rat lethal dose (50 percent kill): 8000 mg/kgTOVEFN (2),29,1997

Other Multiple Dose Data and References

Route/OrganismDoseEffectReference
unreported route/mammal (species unspecified) lowest published toxic dose: 18000 mg/kg/7D- intermittentGastrointestinal: Other changes

Related to Chronic Data: Death in the "MULTIPLE DOSE" data type field		TOVEFN (2),29,1997

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARDNUISANCE PARTICULATESDTLWS* 3,21,1973
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 2.5 mg(F)/m3, JUL2008
Occupational Exposure Limit-BELGIUMtime-weighted average 10 mg/m3, MAR2002
Occupational Exposure Limit-FRANCEVME 10 mg/m3, FEB2006
Occupational Exposure Limit-KOREAtime-weighted average 10 mg/m3, 2006
Occupational Exposure Limit-MEXICOtime-weighted average 10 mg/m3;short term exposure limit 20 mg/m3 (inhalable), 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 10 mg/m3 (inspirable dust), JAN2002
Occupational Exposure Limit-NORWAYtime-weighted average 0.6 mg(F)/m3, JAN1999
Occupational Exposure Limit-PERUtime-weighted average 10 mg/m3, JUL2005
Occupational Exposure Limit-RUSSIAshort term exposure limit 10 mg/m3, JUN2003
Occupational Exposure Limit-SWITZERLANDMAK-week 3 mg/m3, resp, JAN2011
Occupational Exposure Limit-THE NETHERLANDSMAC-TGG 10 mg/m3, 2003
Occupational Exposure Limit-UNITED KINGDOMtime-weighted average 4 mg/m3 (resp. dust), OCT2007
Occupational Exposure Limit-UNITED KINGDOMtime-weighted average 10 mg/m3 (inhal. dust), OCT2007
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 5 mg/m3, respirable fractionCFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 5 mg/m3, respirable fractionCFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1915.1000,1993
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 5 mg/m3, respirable fractionCFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO MAGNESITE, respirable fraction-air10H time-weighted average 5 mg/m3NIOSH* DHHS #92-100,1992
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO MAGNESITE, total dust-air10H time-weighted average 10 mg/m3NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code 80144; Number of Industries 134; Total Number of Facilities 19943; Number of Occupations 128; Total Number of Employees Exposed 348034; Total Number of Female Employees Exposed 53547
National Occupational Hazard Survey 1974Hazard Code M2283; Number of Industries 16; Total Number of Facilities 810; Number of Occupations 20; Total Number of Employees Exposed 11547
National Occupational Hazard Survey 1974Hazard Code 80144; Number of Industries 81; Total Number of Facilities 8724; Number of Occupations 92; Total Number of Employees Exposed 104149

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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