# ANTU (alpha Naphthylthiourea) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For ANTU (alpha Naphthylthiourea), cas no. is 86-88-4; pel (mg/m³) is 0.3, verified against its source on 2026-08-05.

- **Substance:** ANTU (alpha Naphthylthiourea)
- **CAS No.:** 86-88-4
- **PEL (mg/m³):** 0.3

## What the source says

> ANTU (alpha Naphthylthiourea) | 86-88-4 | - | 0.3 | - |

## Source

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

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).