Reference Source

1,2,4-Trichlorobenzene

For 1,2,4-Trichlorobenzene, pel (ppm) is 5; pel (mg/m³) is 40; ceiling is C, verified against its source on 2026-08-05.

Substance
1,2,4-Trichlorobenzene
PEL (ppm)
5
PEL (mg/m³)
40
Ceiling
C
Sourcedir.ca.gov
Verified2026-08-05
Review by2027-08-05
DatasetUS workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

What the source says

120821 | | 1,2,4-Trichlorobenzene | 5 | 40 | C

— dir.ca.gov, retrieved 2026-08-05

Source

Last verified against source: 2026-08-05. Scheduled for re-check by: 2027-08-05. This page as Markdown · OKF concept · full dataset as JSON.