# Silica, amorphous Diatomaceous earth — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Silica, amorphous Diatomaceous earth, substance is Silica, amorphous Diatomaceous earth, verified against its source on 2026-08-05.

- **Substance:** Silica, amorphous Diatomaceous earth

## What the source says

> 61790532 | | Silica, amorphous Diatomaceous earth

## 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/).