# Calcium hydrosulfite (ID 1923)

- **operation:** document
- **citation:** ERG 2024 ID 1923
- **title:** Calcium hydrosulfite (ID 1923)
- **source type:** guidance
- **agency:** U.S. DOT / Transport Canada / SICT
- **status:** guidance
- **official:** true
- **published on:** 2024-04-04
- **effective on:** Not available
- **summary:** ERG2024 assigns Calcium hydrosulfite (ID 1923) to Guide 135: Substances - Spontaneously Combustible.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1923-calcium-hydrosulfite.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1923-calcium-hydrosulfite.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1923-calcium-hydrosulfite
- **source url:** https://www.phmsa.dot.gov/erg/material?materialName=Calcium+hydrosulfite&materialUn=1923
**body:**

ERG identification number: 1923.
Material: Calcium hydrosulfite.
Assigned response guide: Guide 135, Substances - Spontaneously Combustible.
The ERG index does not mark this entry with the P polymerization-hazard indicator.
- **truncated:** false
- **body characters:** 223