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Chemical Sampling Information |
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| Magnesite (Total Dust) |
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General Description
Synonyms: Carbonate magnesium; Hydromagnesite; Magnesium carbonate; Magnesium(II) carbonate; Magnesium (II) carbonate (1:1); Carbonic acid, magnesium salt (1:1)
OSHA IMIS Code Number: 1615
Chemical Abstracts Service (CAS) Registry Number: 13717-00-5
Other Chemical Abstracts Service (CAS) Registry Number: 546-93-0 (Magnesium carbonate)
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: OM2470000
NIOSH Pocket Guide to Chemical Hazards, Magnesite: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 15 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 15 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; The value is for particulate matter containing no asbestos and <1% crystalline silica.
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA
Health Factors
Potential symptoms: Irritation of eyes, skin, respiratory system, cough.
Health Effects: Nuisance particulate-Accumulation in lungs (HE19)
Affected organs: Eyes, skin, respiratory system
Notes: 1) Magnesium carbonate is listed as a direct food substance affirmed by the FDA as GRAS (generally recognized as safe) when used in food with good manufacturing practice (21 CFR 184.1425). 2) Magnesium carbonate is a component of several oral antacid medications.
Date Last Revised: 10/05/2005
Literature Basis:
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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Page last updated: 04/06/2006
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