# Methylene bisphenyl isocyanate (MDI) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methylene bisphenyl isocyanate (MDI), cas no. is 101-68-8; pel (ppm) is (C)0.02; pel (mg/m³) is (C)0.2, verified against its source on 2026-08-05.

- **Substance:** Methylene bisphenyl isocyanate (MDI)
- **CAS No.:** 101-68-8
- **PEL (ppm):** (C)0.02
- **PEL (mg/m³):** (C)0.2

## What the source says

> Methylene bisphenyl isocyanate (MDI) | 101-68-8 | (C)0.02 | (C)0.2 | - |

## 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/).