# 1,4-Dichloro-2-butene

URL: https://app.greenveil.ai/ingredients/ingredient_cas_764_41_0
Categories: beauty, industrial
Identifier: 764-41-0

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

## Safety assessment

- Chemical concern score: 100/100 — Critical concern driven by cmr.
- Confidence: 4
- Rationale: 1,4-Dichlorobut-2-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. 1B(C=>0.01%)
- US: commercial use observed — EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.

_Assessed by Greenveil._