---
type: threshold
id: naphtha-coal-tar-2
asset: workplace-exposure-limits
title: "Naphtha, coal tar — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "8030317 | | Naphtha, coal tar | 100 | 400"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Naphtha, coal tar"
pel_ppm: "100"
pel_mgm3: "400"
verified: true
---
**Substance:** Naphtha, coal tar

**PEL (ppm):** 100

**PEL (mg/m³):** 400

> 8030317 | | Naphtha, coal tar | 100 | 400

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