# Subtilisins — workplace exposure limit

For Subtilisins, niosh rel (mg/m³) is ST 0.00006; cas no. is 1395-21-7 (BPN) 9014-01-1 (Carlsburg), verified against its source on 2026-09-08.

- **Substance:** Subtilisins _(verified: appears in its own passage below)_
- **CAS No.:** 1395-21-7 (BPN) 9014-01-1 (Carlsburg) _(verified: appears in its own passage below)_
- **NIOSH REL (mg/m³):** ST 0.00006 _(verified: appears in the quote below)_

## What the source says

> NIOSH REL ST 0.00006 mg/m3 [60-minute]

## Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

### Substance

> CDC - NIOSH Pocket Guide to Chemical Hazards - Subtilisins

### CAS No.

> CAS No. 1395-21-7 (BPN) 9014-01-1 (Carlsburg)

## Source

- https://www.cdc.gov/niosh/npg/npgd0572.html

Last verified: 2026-09-08. Review by: 2027-09-08.
Part of [US workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side](https://referencesource.org/workplace-exposure-limits/).