---
type: threshold
id: phosphoric-acid
asset: workplace-exposure-limits
title: "Phosphoric acid — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
source_quote: "Phosphoric acid | 7664-38-2 | - | 1 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Phosphoric acid"
cas_number: "7664-38-2"
pel_mgm3: "1"
verified: true
---
**Substance:** Phosphoric acid

**CAS No.:** 7664-38-2

**PEL (mg/m³):** 1

> Phosphoric acid | 7664-38-2 | - | 1 | - |

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