# Phosphorous acid (ID 2834)

- **operation:** document
- **citation:** ERG 2024 ID 2834
- **title:** Phosphorous acid (ID 2834)
- **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 Phosphorous acid (ID 2834) to Guide 154: Substances - Toxic and/or Corrosive (Non-Combustible).
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id2834-phosphorous-acid.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id2834-phosphorous-acid.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id2834-phosphorous-acid
- **source url:** https://www.phmsa.dot.gov/erg/material?materialName=Phosphorous+acid&materialUn=2834
**body:**

ERG identification number: 2834.
Material: Phosphorous acid.
Assigned response guide: Guide 154, Substances - Toxic and/or Corrosive (Non-Combustible).
The ERG index does not mark this entry with the P polymerization-hazard indicator.
- **truncated:** false
- **body characters:** 234