---
type: threshold
id: diphenyl-biphenyl
asset: workplace-exposure-limits
title: "Diphenyl (Biphenyl) — 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: "Diphenyl (Biphenyl) | 92-52-4 | 0.2 | 1 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Diphenyl (Biphenyl)"
cas_number: "92-52-4"
pel_ppm: "0.2"
pel_mgm3: "1"
verified: true
---
**Substance:** Diphenyl (Biphenyl)

**CAS No.:** 92-52-4

**PEL (ppm):** 0.2

**PEL (mg/m³):** 1

> Diphenyl (Biphenyl) | 92-52-4 | 0.2 | 1 | - |

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