# Propyne; see Methylacetylene — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Propyne; see Methylacetylene, substance is Propyne; see Methylacetylene, verified against its source on 2026-08-05.

- **Substance:** Propyne; see Methylacetylene

## What the source says

> 74997 | | Propyne; see Methylacetylene

## Source

- https://www.dir.ca.gov/title8/5155.html

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/).