# Methylene bis(phenylisocyanate); MDI; diphenylmethane diisocyanate — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methylene bis(phenylisocyanate); MDI; diphenylmethane diisocyanate, pel (ppm) is 0.005; pel (mg/m³) is 0.051, verified against its source on 2026-08-05.

- **Substance:** Methylene bis(phenylisocyanate); MDI; diphenylmethane diisocyanate
- **PEL (ppm):** 0.005
- **PEL (mg/m³):** 0.051

## What the source says

> 101688 | | Methylene bis(phenylisocyanate); MDI; diphenylmethane diisocyanate | 0.005 | 0.051

## 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/).