Carbon monoxide

CAS RN: 630-08-0

OSHA Standards

Permissible Exposure Limit: Table Z-1 8-hr Time Weighted Avg: 50 ppm (55 mg/cu m).
Vacated 1989 OSHA PEL TWA 35 ppm (40 mg/cu m); Ceiling limit 200 ppm (229 mg/cu m) is still enforced in some states.
Find more information on this substance at: PubChem, PubMed