---
type: threshold
id: trichloronaphthalene
asset: workplace-exposure-limits
title: "Trichloronaphthalene — 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: "Trichloronaphthalene | 1321-65-9 | - | 5 | X |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Trichloronaphthalene"
cas_number: "1321-65-9"
pel_mgm3: "5"
verified: true
---
**Substance:** Trichloronaphthalene

**CAS No.:** 1321-65-9

**PEL (mg/m³):** 5

> Trichloronaphthalene | 1321-65-9 | - | 5 | X |

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