# Isobutyl alcohol — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Isobutyl alcohol, cas no. is 78-83-1; pel (ppm) is 100; pel (mg/m³) is 300, verified against its source on 2026-08-05.

- **Substance:** Isobutyl alcohol
- **CAS No.:** 78-83-1
- **PEL (ppm):** 100
- **PEL (mg/m³):** 300

## What the source says

> Isobutyl alcohol | 78-83-1 | 100 | 300 | - |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

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/).