Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone

For Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone, pel (ppm) is 200; pel (mg/m³) is 590; stel (ppm) is 300; stel (mg/m³) is 885, verified against its source on 2026-08-05.

Substance: Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone
PEL (ppm): 200
PEL (mg/m³): 590
STEL (ppm): 300
STEL (mg/m³): 885

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

78933 | | Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone | 200 | 590 | | 300 | 885

— dir.ca.gov, retrieved 2026-08-05

Source

dir.ca.govhttps://www.dir.ca.gov/title8/5155.html

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.