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Chemical Sampling Information |
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| Calcium Carbonate (Total Dust) |
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General Description
Synonyms: Calcium salt of carbonic acid; Carbonic acid, calcium salt (1:1) [Note: Occurs in nature as limestone, chalk, marble, dolomite, aragonite, calcite & oyster shells.]
OSHA IMIS Code Number: 0505
Chemical Abstracts Service (CAS) Registry Number: 471-34-1
Other Chemical Abstracts Service (CAS) Registry Number: 1317-65-3 (Calcium Carbonate, OSHA/NIOSH)
NIOSH, Registry of Toxic Effects (RTECS) Identification Numbers: EV9580000 and FF9335000
NIOSH Pocket Guide to Chemical Hazards, Calcium Carbonate: 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; INGES. ACUTE: Irritability, nausea, dehydration, constipation; INGES. CHRONIC (>8 g/day): Blood and kidney disorders.
Health Effects: Nuisance Particulates (HE19)
Affected organs: Eyes, skin, respiratory system
Notes: 1) The estimated acute lethal dose of calcium carbonate ingested orally is over two pounds. 2) Chalk powder factory workers in the chalk-sacking workstation, the section said to have the greatest dustiness (dust levels not reported), showed significant decreases in pulmonary function parameters, when compared with the other workers at the factory (after adjustment for smoking). Workers in the chalk-sacking section also had the highest incidences of complaints of dyspnea and cough/sputum.
Date Last Revised: 09/21/2005
Literature Basis:
- NIOSH Pocket Guide to Chemical Hazards: Calcium Carbonate.
- International Chemical Safety Cards (WHO/IPCS/ILO): Calcium carbonate.
- Bohadana, A.B., Massin, N., Wild, P. and Berthiot, G.: Airflow obstruction in chalkpowder and sugar workers. Int. Arch. Occup. Environ. Health 68(4): 243-248, 1996.
- Pohanish, R.P. (editor): Calcium Carbonate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 453-454.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: tared 37-mm diameter low-ash polyvinyl chloride filter
maximum volume: 960 Liters minimum volume: 480 Liters maximum flow rate: 2.0 L/min
current analytical method: Gravimetric
method reference: OSHA Analytical Method (OSHA PV2121)
method classification: Partially Validated
note: OSHA personnel can obtain tared sampling media from SLTC.
note: If the net weight of the sample yields a concentration below the standard for the substance, SLTC will perform no further work on that sample. If the net weight corresponds to an amount greater than the standard, the sample may be analyzed for the appropriate element and the result reported as the substance.
current elemental analysis method: Atomic Absorption Spectroscopy; AAS
method reference: OSHA Analytical Method (OSHA 121)
method classification: Validated
note: An elemental analysis is performed for total calcium and reported as the compound.
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Page last updated: 04/06/2006
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