# Paraquat (Paraquat dichloride) — workplace exposure limit

For Paraquat (Paraquat dichloride), niosh rel, as stated is TWA 0.1 mg/m3 (resp) [skin]; cas no. is 1910-42-5, verified against its source on 2026-09-08.

- **Substance:** Paraquat (Paraquat dichloride) _(verified: appears in its own passage below)_
- **CAS No.:** 1910-42-5 _(verified: appears in its own passage below)_
- **NIOSH REL, as stated:** TWA 0.1 mg/m3 (resp) [skin] _(verified: appears in the quote below)_

## What the source says

> NIOSH REL TWA 0.1 mg/m3 (resp) [skin]

## Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

### Substance

> CDC - NIOSH Pocket Guide to Chemical Hazards - Paraquat (Paraquat dichloride)

### CAS No.

> CAS No. 1910-42-5

## Source

- https://www.cdc.gov/niosh/npg/npgd0478.html

Last verified: 2026-09-08. Review by: 2027-09-08.
Part of [US workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side](https://referencesource.org/workplace-exposure-limits/).