# 4,5-Dihydro-2-mercaptoimidazole

URL: https://app.greenveil.ai/ingredients/ingredient_cas_96_45_7
Categories: beauty, industrial
Functions: Catalyst, Dispersing agent
Identifier: 96-45-7

> 4,5-Dihydro-2-mercaptoimidazole is used as catalyst / dispersing agent. 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: Imidazolidine-2-thione (Ethylene thiourea) 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: Reprotoxic Cat. 1B()
- US: commercial use observed — EPA CPDat observed this chemical in 53 composition records across product categories including Laboratory supplies, Personal care, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including Catalyst, Dispersing agent.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._