# Barium (ID 1400)

- **operation:** document
- **citation:** ERG 2024 ID 1400
- **title:** Barium (ID 1400)
- **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 Barium (ID 1400) to Guide 138: Substances - Water-Reactive (Emitting Flammable Gases).
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1400-barium.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1400-barium.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-erg-2024-material-id1400-barium
- **source url:** https://www.phmsa.dot.gov/erg/material?materialName=Barium&materialUn=1400
**body:**

ERG identification number: 1400.
Material: Barium.
Assigned response guide: Guide 138, Substances - Water-Reactive (Emitting Flammable Gases).
The ERG index does not mark this entry with the P polymerization-hazard indicator.
- **truncated:** false
- **body characters:** 225