---
type: threshold
id: tridymite
asset: workplace-exposure-limits
title: "Tridymite, — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "15468323 | | Tridymite, | -- | 0.05"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Tridymite,"
pel_mgm3: "0.05"
verified: true
---
**Substance:** Tridymite,

**PEL (mg/m³):** 0.05

> 15468323 | | Tridymite, | -- | 0.05

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