---
type: threshold
id: isobutyl-alcohol-2-methylpropanol
asset: workplace-exposure-limits
title: "Isobutyl alcohol; 2-methylpropanol — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "78831 | | Isobutyl alcohol; 2-methylpropanol | 50 | 150"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Isobutyl alcohol; 2-methylpropanol"
pel_ppm: "50"
pel_mgm3: "150"
verified: true
---
**Substance:** Isobutyl alcohol; 2-methylpropanol

**PEL (ppm):** 50

**PEL (mg/m³):** 150

> 78831 | | Isobutyl alcohol; 2-methylpropanol | 50 | 150

Source: <https://www.dir.ca.gov/title8/5155.html>