Plaster of paris
RTECS #
TP0700000
CAS #
Updated
March 2011
Molecular Weight
145.15
Molecular Formula
O4S·Ca·1/2H2O
Synonyms
Crystacal
Densite
Densite (gypsum)
FGR
Gypsum hemihydrate
Hemihydrate gypsum
Plaster of paris (ACGIH:OSHA)
Plaster of Paris (Ca(SO4).1/2H2O) (9CI)
TA 20
Densite
Densite (gypsum)
FGR
Gypsum hemihydrate
Hemihydrate gypsum
Plaster of paris (ACGIH:OSHA)
Plaster of Paris (Ca(SO4).1/2H2O) (9CI)
TA 20
Standards and Regulations
| Organization | Standard | Reference |
|---|---|---|
| Occupational Exposure Limit-MEXICO | time-weighted average 10 mg/m3;short term exposure limit 20 mg/m3, 2004 | |
| Occupational Exposure Limit-UNITED KINGDOM | time-weighted average 10 mg/m3 (inhal. dust), OCT2007 | |
| Occupational Exposure Limit-UNITED KINGDOM | time-weighted average 4 mg/m3 (resp. dust), OCT2007 | |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction) | 8H time-weighted average 15 mg/m3, total dust | CFRGBR 29,1926.55,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction) | 8H time-weighted average 5 mg/m3, respirable fraction | CFRGBR 29,1926.55,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry) | 8H time-weighted average 15 mg/m3, total dust | CFRGBR 29,1910.1000,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry) | 8H time-weighted average 5 mg/m3, respirable fraction | CFRGBR 29,1910.1000,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards) | 8H time-weighted average 15 mg/m3, total dust | CFRGBR 29,1915.1000,1993 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards) | 8H time-weighted average 5 mg/m3, respirable fraction | CFRGBR 29,1915.1000,1993 |
NIOSH Documentation and Surveillance
| Organization | Standard | Reference |
|---|---|---|
| National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO PLASTER OF PARIS, resp. fraction-air | 10H time-weighted average 5 mg/m3 | NIOSH* DHHS #92-100,1992 |
| National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO PLASTER OF PARIS, total dust-air | 10H time-weighted average 10 mg/m3 | NIOSH* DHHS #92-100,1992 |
| National Occupational Exposure Survey 1983 | Hazard Code 60122; Number of Industries 21; Total Number of Facilities 2201; Number of Occupations 28; Total Number of Employees Exposed 60066; Total Number of Female Employees Exposed 7948 | |
| National Occupational Hazard Survey 1974 | Hazard Code M4257; Number of Industries 68; Total Number of Facilities 11334; Number of Occupations 61; Total Number of Employees Exposed 192121 |
Page last reviewed: November 16, 2018
Content
source: National Institute for Occupational Safety and Health