CDC - Immediately Dangerous to Life or Health Concentrations (IDLH): Carbon monoxide - NIOSH Publica

Carbon monoxide CAS number: 630–08–0 NIOSH REL: 35 ppm (40 mg/m 3) TWA, 200 ppm (229 mg/m 3) CEILING Current OSHA PEL: 50 ppm (55 mg/m 3) TWA 1989 OSHA PEL: 35 ppm (40 mg/m 3) TWA, 200 ppm (229 mg/m 3) CEILING 1993-1994 ACGIH TLV: 25 ppm (29 mg/m ...

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