Reference Source

Methyl tert-butyl ether; MTBE

For Methyl tert-butyl ether; MTBE, pel (ppm) is 40; pel (mg/m³) is 144, verified against its source on 2026-08-05.

Substance
Methyl tert-butyl ether; MTBE
PEL (ppm)
40
PEL (mg/m³)
144
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

1634044 | | Methyl tert-butyl ether; MTBE | 40 | 144

— 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.