| Organization | Standard | Reference |
|---|
| Mine Safety and Health Administration (MSHA) STANDARD-air | time-weighted average 10 mg/m3 | DTLWS* 3,11,1973 |
| 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 0.1 mg(Te)/m3, JUL2008 | |
| Occupational Exposure Limit-AUSTRALIA | time-weighted average 10 mg/m3, JUL2008 | |
| Occupational Exposure Limit-BELGIUM | time-weighted average 0.1 mg(Te)/m3, MAR2002 | |
| Occupational Exposure Limit-BELGIUM | time-weighted average 10 mg/m3, MAR2002 | |
| Occupational Exposure Limit-DENMARK | time-weighted average 10 mg/m3, MAY2011 | |
| Occupational Exposure Limit-FRANCE | VME 10 mg/m3, FEB2006 | |
| Occupational Exposure Limit-ICELAND | time-weighted average 10 mg/m3, NOV2011 | |
| Occupational Exposure Limit-KOREA | time-weighted average 10 mg/m3, 2006 | |
| Occupational Exposure Limit-MEXICO | time-weighted average 10 mg/m3;short term exposure limit 20 mg/m3, 2004 | |
| Occupational Exposure Limit-MEXICO | time-weighted average 0.1 mg(Te)/m3, 2004 | |
| Occupational Exposure Limit-NEW ZEALAND | time-weighted average 10 mg/m3, JAN2002 | |
| Occupational Exposure Limit-NORWAY | time-weighted average 10 mg/m3, JAN1999 | |
| Occupational Exposure Limit-PERU | time-weighted average 10 mg/m3, JUL2005 | |
| Occupational Exposure Limit-SWITZERLAND | MAK-week 0.1 mg(Te)/m3, KZG-week 0.2 mg(Te)/m3, inhal, JAN2011 | |
| Occupational Exposure Limit-THE NETHERLANDS | MAC-TGG 10 mg/m3, 2003 | |
| Occupational Exposure Limit-UNITED KINGDOM | time-weighted average 10 mg/m3;short term exposure limit 20 mg/m3, 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 dust | CFRGBR 29,1926.55,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction) | 8H time-weighted average 0.1 mg(Te)/m3 | 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 dust | CFRGBR 29,1910.1000,1994 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry) | 8H time-weighted average 0.1 mg(Te)/m3 | 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 dust | CFRGBR 29,1915.1000,1993 |
| Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards) | 8H time-weighted average 0.1 mg(Te)/m3 | CFRGBR 29,1915.1000,1993 |
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