# Paraformaldehyde (ID 2213)

**Citation:** ERG 2024 ID 2213  
**Type / status:** guidance / guidance  
**Agency:** U.S. DOT / Transport Canada / SICT  
**Effective:** Not stated  
**Published:** 2024-04-04

ERG2024 assigns Paraformaldehyde (ID 2213) to Guide 133: Flammable Solids.

## Document text

ERG identification number: 2213.
Material: Paraformaldehyde.
Assigned response guide: Guide 133, Flammable Solids.
The ERG index does not mark this entry with the P polymerization-hazard indicator.

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/erg/material?materialName=Paraformaldehyde&materialUn=2213>
- Source ID: `phmsa-erg-2024`
- SHA-256: `b454df374e0c1f17864bbb38c268104d83b2bc4f3d69235d7de763d9cbb225c1`
- Retrieved: 2026-08-13T11:31:32.574Z
- Exported: 2026-08-25T10:24:33.967Z
- Document slug: `phmsa-erg-2024-material-id2213-paraformaldehyde`

### Source metadata

```json
{
  "edition": 2024,
  "language": "English",
  "jurisdiction": "US",
  "caveat": "Emergency-response guidance for the initial phase of a transportation incident. It is not controlling regulation, a compliance determination, a chemical-specific worker safety document, or a substitute for required shipping-paper emergency-response information.",
  "materialSubtype": "phmsa_erg_material",
  "recordKind": "material",
  "collectionId": "phmsa-erg-2024-overview",
  "parentDocumentId": "phmsa-erg-2024-overview",
  "sourceDateLabel": "Effective Date",
  "sourceDate": "2024-04-04",
  "idNumber": "2213",
  "materialName": "Paraformaldehyde",
  "guideNumber": 133,
  "guideTitle": "Flammable Solids",
  "polymerizationHazard": false,
  "physicalPage": 51,
  "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/2024-04/ERG2024-Eng-Web-a.pdf#page=51"
}
```