Calcium oxide
RTECS #
EW3100000
CAS #
Updated
September 2013
Molecular Weight
56.08
Molecular Formula
CaO
Synonyms
Airlock
BELL cml(E)
Burnt lime
Calcia
Calcium oxide (ACGIH:OSHA)
Caloxol CP2
Caloxol W3
CALX
Calxyl
CML 21
CML 31
Desical P
Lime
Lime, burned
Oxyde de calcium (French)
Quicklime
Rhenosorb C
Rhenosorb F
Wapniowy tlenek (Polish)
BELL cml(E)
Burnt lime
Calcia
Calcium oxide (ACGIH:OSHA)
Caloxol CP2
Caloxol W3
CALX
Calxyl
CML 21
CML 31
Desical P
Lime
Lime, burned
Oxyde de calcium (French)
Quicklime
Rhenosorb C
Rhenosorb F
Wapniowy tlenek (Polish)
Acute Toxicity Data and References
| Route/Organism | Dose | Effect | Reference |
|---|---|---|---|
| intraperitoneal/mouse | lethal dose (50 percent kill): 3059 mg/kg | VCVN1* -,115,1988 |
Reviews
| Organization | Standard | Reference |
|---|---|---|
| American Conference of Governmental Industrial Hygienists (ACGIH) | Threshold Limit Value-time-weighted average 2 mg/m3 | DTLVS* TLV/BEI,2013 |
| TOXICOLOGY REVIEW | CHHSA* 9,6,2002 | |
| TOXICOLOGY REVIEW | TIHEEC 18,321,2002 |
Standards and Regulations
| Organization | Standard | Reference |
|---|---|---|
| Environmental Protection Agency (EPA) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION | FEREAC 54,7740,1989 | |
| Environmental Protection Agency (EPA) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) 1998 STATUS OF PESTICIDES | Cancelled | RBREV* -,325,1998 |
| Mine Safety and Health Administration (MSHA) STANDARD-air | time-weighted average 3 mg/m3 | DTLVS* 3,36,1971 |
| Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV; | ||
| Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV | ||
| Occupational Exposure Limit-AUSTRALIA | time-weighted average 2 mg/m3, JUL2008 | |
| Occupational Exposure Limit-AUSTRIA | MAK-TMW 2 mg/m3;KZW 4 mg/m3, inhal, 2007 | |
| Occupational Exposure Limit-BELGIUM | time-weighted average 2 mg/m3, MAR2002 | |
| Occupational Exposure Limit-DENMARK | time-weighted average 2 mg/m3, MAY2011 | |
| Occupational Exposure Limit-FINLAND | time-weighted average 2 mg/m3, NOV2011 | |
| Occupational Exposure Limit-FRANCE | VME 2 mg/m3, FEB2006 | |
| Occupational Exposure Limit-HUNGARY | time-weighted average 5 mg/m3, short term exposure limit 5 mg/m3, SEP2000 | |
| Occupational Exposure Limit-ICELAND | time-weighted average 2 mg/m3, NOV2011 | |
| Occupational Exposure Limit-INDIA | time-weighted average 2 mg/m3, JAN1993 | |
| Occupational Exposure Limit-KOREA | time-weighted average 2 mg/m3, 2006 | |
| Occupational Exposure Limit-MEXICO | time-weighted average 2 mg/m3, 2004 | |
| Occupational Exposure Limit-NEW ZEALAND | time-weighted average 2 mg/m3, JAN2002 | |
| Occupational Exposure Limit-NORWAY | time-weighted average 2 mg/m3, JAN1999 | |
| Occupational Exposure Limit-PERU | time-weighted average 2 mg/m3, JUL2005 | |
| Occupational Exposure Limit-POLAND | MAC(time-weighted average) 2 mg/m3, MAC(short term exposure limit) 6 mg/m3, JAN1999 | |
| Occupational Exposure Limit-RUSSIA | short term exposure limit 1 mg/m3, Skin, JUN2003 | |
| Occupational Exposure Limit-SWEDEN | time-weighted average 1 mg/m3;short term exposure limit 2.5 mg/m3, JUN2005 | |
| Occupational Exposure Limit-SWITZERLAND | ceiling concentration 2 mg/m3, inhal, JAN2011 | |
| Occupational Exposure Limit-THE NETHERLANDS | MAC-TGG 2 mg/m3, 2003 | |
| Occupational Exposure Limit-THE PHILIPPINES | time-weighted average 5 mg/m3, JAN1993 | |
| Occupational Exposure Limit-TURKEY | time-weighted average 5 mg/m3, JAN1993 | |
| Occupational Exposure Limit-UNITED KINGDOM | time-weighted average 2 mg/m3, OCT2007 | |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction) | 8H time-weighted average 5 mg/m3 | CFRGBR 29,1926.55,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors) | 8H time-weighted average 5 mg/m3 | CFRGBR 41,50-204.50,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry) | 8H time-weighted average 5 mg/m3 | CFRGBR 29,1910.1000,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards) | 8H time-weighted average 5 mg/m3 | CFRGBR 29,1915.1000,1993 |
NIOSH Documentation and Surveillance
| Organization | Standard | Reference |
|---|---|---|
| National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO CALCIUM OXIDE-air | 10H time-weighted average 2 mg/m3 | NIOSH* DHHS #95-121,1995 |
| National Occupational Exposure Survey 1983 | Hazard Code X9892; Number of Industries 1; Total Number of Facilities 9; Number of Occupations 1; Total Number of Employees Exposed 104 | |
| National Occupational Exposure Survey 1983 | Hazard Code 15755; Number of Industries 251; Total Number of Facilities 38096; Number of Occupations 153; Total Number of Employees Exposed 726694; Total Number of Female Employees Exposed 71548 | |
| National Occupational Hazard Survey 1974 | Hazard Code 15755; Number of Industries 158; Total Number of Facilities 16328; Number of Occupations 114; Total Number of Employees Exposed 284781 |
Status in Federal Agencies
Page last reviewed: November 16, 2018
Content
source: National Institute for Occupational Safety and Health