||Chemical Sampling Information
Synonyms: Burned lime; Burnt lime; Lime, Pebble lime; Quicklime; Unslaked lime
OSHA IMIS Code Number: 0520
Chemical Abstracts Service (CAS) Registry Number: 1305-78-8
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: EW3100000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1910 157 [27 KB PDF]
NIOSH Pocket Guide to Chemical Hazards, Calcium Oxide: chemical description, physical properties, potentially hazardous incompatibilities, and more
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 5 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 5 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 5 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 2 mg/m3 TWA
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 2 mg/m3 TWA
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 25 mg/m3
Potential symptoms: Irritation of eyes, skin, upper respiratory tract; ulcerated, perforated nasal septum; pneumonitis, pulmonary edema (may be delayed); lacrimation, spasmodic blinking; brittle nails, irritant contact dermatitis.
Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14)
Affected organs: Eyes, skin, respiratory system
- Calcium oxide is affirmed by the FDA as a generally recognized as safe (GRAS) direct food substance (21 CFR 184.1210).
- Prolonged contact with wet cement, which is alkaline due to the reaction of water with calcium oxide to form calcium hydroxide, can result in full-thickness skin burns that may require surgical treatment.
Date Last Revised: 07/20/2006
Monitoring Methods used by OSHA
- NIOSH Pocket Guide to Chemical Hazards: Calcium Oxide.
- International Chemical Safety Cards (WHO/IPCS/ILO): Calcium oxide.
- Cain, W.S., et al.: Sensory and associated reactions to mineral dusts: sodium borate, calcium oxide, and calcium sulfate. J. Occup. Environ. Hyg. 1(4): 222-236, 2004.
- Pohanish, R.P. (editor): Calcium Oxide. In, Sittig’s Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 468-470.
- Spoo, J. and Elsner, P.: Cement burns: a review 1960-2000. Contact Dermatitis 45(2): 68-71, 2001.
- Winder, C. and Carmody, M.: The dermal toxicity of cement. Toxicol. Ind. Health 18(7): 321-331, 2002.
Laboratory Sampling/Analytical Method:
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sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
maximum volume: 960 Liters minimum volume: 480 Liters maximum flow rate: 2.0 L/min
current analytical method: Atomic Absorption Spectroscopy; AAS
method reference: OSHA Analytical Method (OSHA ID-121)
method classification: Partially Validated
note: Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period. When analysis of a compound is requested, an elemental analysis is performed and reported as the compound.