---
type: threshold
id: sodium-hydroxide-caustic-soda
asset: workplace-exposure-limits
title: "Sodium hydroxide; caustic soda — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "1310732 | | Sodium hydroxide; caustic soda | -- | 2 | C"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Sodium hydroxide; caustic soda"
pel_mgm3: "2"
ceiling: "C"
verified: true
---
**Substance:** Sodium hydroxide; caustic soda

**PEL (mg/m³):** 2

**Ceiling:** C

> 1310732 | | Sodium hydroxide; caustic soda | -- | 2 | C

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