# (4S)-4-Cyclohexyl-L-proline--hydrogen chloride (1/1)

URL: https://app.greenveil.ai/ingredients/ingredient_cas_90657_55_9
Categories: beauty, industrial
Identifier: 90657-55-9

> (4S)-4-Cyclohexyl-L-proline--hydrogen chloride (1/1). 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: trans-4-cyclohexyl-L-proline monohydrochloride 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. 2()
- US: commercial use observed — EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.

_Assessed by Greenveil._