Reference Source

Chlorpyrifos — workplace exposure limit

What is the pel (mg/m³) for Chlorpyrifos — workplace exposure limit?

For Chlorpyrifos, pel (mg/m³) is 0.2; cas no. is 2921882, verified against its source on 2026-08-05.

2921882 | S | Chlorpyrifos | -- | 0.2

— dir.ca.gov, retrieved 2026-08-05

Substance
Chlorpyrifos verified
CAS No.
2921882 verified
PEL (mg/m³)
0.2 verified
NIOSH REL (mg/m³)
TWA 0.2 per cdc.gov
Sourcedir.ca.gov
Verified
Review by
DatasetUS workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side

What cdc.gov says

NIOSH REL TWA 0.2 mg/m3 ST 0.6 mg/m3 [skin]

— cdc.gov, retrieved 2026-09-08

Sources

Last verified against source: . Due for re-check by . This page as Markdown · OKF bundle · full dataset as JSON.

What is the OSHA exposure limit for this substance?Find the exposure limit for a substance in workplace air — federal OSHA, California and NIOSH, side by side.

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