---
type: threshold
id: nickel-carbonyl-ni-co-4
asset: workplace-exposure-limits
title: "Nickel carbonyl; Ni (CO) $4 — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "13463393 | | Nickel carbonyl; Ni (CO) $4 | 0.001 | 0.007"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Nickel carbonyl; Ni (CO) $4"
pel_ppm: "0.001"
pel_mgm3: "0.007"
verified: true
---
**Substance:** Nickel carbonyl; Ni (CO) $4

**PEL (ppm):** 0.001

**PEL (mg/m³):** 0.007

> 13463393 | | Nickel carbonyl; Ni (CO) $4 | 0.001 | 0.007

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