# Methyl isobutyl carbinol; 4-methyl-2-pentanol; methyl amyl alcohol — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methyl isobutyl carbinol; 4-methyl-2-pentanol; methyl amyl alcohol, pel (ppm) is 25; pel (mg/m³) is 100; stel (ppm) is 40; stel (mg/m³) is 165, verified against its source on 2026-08-05.

- **Substance:** Methyl isobutyl carbinol; 4-methyl-2-pentanol; methyl amyl alcohol
- **PEL (ppm):** 25
- **PEL (mg/m³):** 100
- **STEL (ppm):** 40
- **STEL (mg/m³):** 165

## What the source says

> 108112 | S | Methyl isobutyl carbinol; 4-methyl-2-pentanol; methyl amyl alcohol | 25 | 100 | | 40 | 165

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).