---
type: threshold
id: temephos-o-o-o-o-tetramethyl-o-o-thiodi-p-phenylene-phosphorothioate-total-dust
asset: workplace-exposure-limits
title: "Temephos; o,o,o′ ,o′-tetramethyl o,o′-thiodi-p-phenylene phosphorothioate Total dust — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "3383968 | | Temephos; o,o,o′ ,o′-tetramethyl o,o′-thiodi-p-phenylene phosphorothioate Total dust | -- | 10"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Temephos; o,o,o′ ,o′-tetramethyl o,o′-thiodi-p-phenylene phosphorothioate Total dust"
pel_mgm3: "10"
verified: true
---
**Substance:** Temephos; o,o,o′ ,o′-tetramethyl o,o′-thiodi-p-phenylene phosphorothioate Total dust

**PEL (mg/m³):** 10

> 3383968 | | Temephos; o,o,o′ ,o′-tetramethyl o,o′-thiodi-p-phenylene phosphorothioate Total dust | -- | 10

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