---
type: threshold
id: heptane-n-heptane
asset: workplace-exposure-limits
title: "Heptane (n-Heptane) — 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: "Heptane (n-Heptane) | 142-82-5 | 500 | 2000 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Heptane (n-Heptane)"
cas_number: "142-82-5"
pel_ppm: "500"
pel_mgm3: "2000"
verified: true
---
**Substance:** Heptane (n-Heptane)

**CAS No.:** 142-82-5

**PEL (ppm):** 500

**PEL (mg/m³):** 2000

> Heptane (n-Heptane) | 142-82-5 | 500 | 2000 | - |

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