---
type: threshold
id: parathion-o-o-diethyl-o-p-nitrophenyl-phosphorothioate
asset: workplace-exposure-limits
title: "Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "56382 | S | Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate | -- | 0.1"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate"
pel_mgm3: "0.1"
verified: true
---
**Substance:** Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate

**PEL (mg/m³):** 0.1

> 56382 | S | Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate | -- | 0.1

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