---
type: threshold
id: nitric-acid
asset: workplace-exposure-limits
title: "Nitric 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: "Nitric acid | 7697-37-2 | 2 | 5 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Nitric acid"
cas_number: "7697-37-2"
pel_ppm: "2"
pel_mgm3: "5"
verified: true
---
**Substance:** Nitric acid

**CAS No.:** 7697-37-2

**PEL (ppm):** 2

**PEL (mg/m³):** 5

> Nitric acid | 7697-37-2 | 2 | 5 | - |

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