Chemical Sampling Information
	Calcium hydroxide
Quick Links General Description Exposure Limits Health Factors Monitoring Search    [use word(s)/phrase] Table of Contents By Name A B C D E F G H I J K L M N O P Q R S T U V W X Y Z By CAS Number General Description Synonyms: Calcium hydrate; Caustic lime; Hydrated lime; Slaked lime OSHA IMIS Code Number: 0515 Chemical Abstracts Service (CAS) Registry Number: 1305-62-0 NIOSH, Registry of Toxic Effects (RTECS) Identification Number: EW2800000 NIOSH Pocket Guide to Chemical Hazards, Calcium hydroxide: 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 -- 5 mg/m3 TWA (Respirable Fraction); 15 mg/m3 TWA (Total Dust) OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 5 mg/m3 TWA (Respirable Fraction); 15 mg/m3 TWA (Total Dust) American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 mg/m3 TWA National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA Health Factors Potential symptoms: Irritation of eyes, skin, upper respiratory system; eye, skin burns; skin vesiculation; cough, bronchitis, pneumonitis. Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14) Affected organs: Eyes, skin, respiratory system Notes: Calcium hydroxide is affirmed by the FDA as a generally recognized as safe (GRAS) direct food substance (21 CFR 184.1205). 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: 06/04/2007 Literature Basis: NIOSH Pocket Guide to Chemical Hazards: Calcium hydroxide. International Chemical Safety Cards (WHO/IPCS/ILO): Calcium hydroxide. Pohanish, R.P. (editor): Calcium Hydroxide. In, Sittig’s Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 464-465. Sherman S.C. and Larkin, K.: Cement burns. J. Emerg. Med. 29(1): 97-99, 2005. 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. Monitoring Methods used by OSHA Laboratory Sampling/Analytical Method: 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. All Trademarks are the property of their respective owners.