# 2,3,4-Trichloro-1-butene

URL: https://app.greenveil.ai/ingredients/ingredient_cas_2431_50_7
Categories: beauty, industrial
Identifier: 2431-50-7

> 2,3,4-Trichloro-1-butene. Greenveil chemical-concern score: 100/100 — Critical concern driven by cmr.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 100/100 — Critical concern driven by cmr.
- Confidence: 4
- Rationale: 2,3,4-Trichlorobut-1-ene is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

## Regulatory status

- EU: banned — Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Carcinogenic Cat. 2(C=>0.1%)
- US: commercial use observed — EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._