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GREENVEIL

  • beauty
  • industrial

Ethyl L-cysteinate hydrochloride

CAS 868-59-7

Ethyl L-cysteinate hydrochloride chemical structure

Concern score

Not assessed — no hazard data yet.

Ethyl L-cysteinate hydrochloride in plain language

What it is

On cosmetic ingredient lists it appears as “Ethyl cysteinate hcl”.

Also known as Ethyl cysteinate hcl · Ethyl l-cysteine hydrochloride · hydrochloride L-cysteine ethyl ester · Ethyl cysteinate hydrochloride · Ethitanin · Cysteine, ethyl ester, hydrochloride, l-

Show all 16 names

Ethyl L-2-AMINO-3-MERCAPTOPROPIONATE hydrochloride · Ethyl L-cysteinate--hydrogen chloride (1/1) · L-cysteine, ethyl ester, hydrochloride · L-cysteine, ethyl ester, hydrochloride (1:1) · Cystanin · Cysteine ethyl ester hydrochloride · Ethyl cysteine hydrochloride · L-cysteine ethylester hydrochloride · Mucastine · UNII-AM467TB2I1

What it does

Used in cosmetics as a skin protectant.

  • Skin protecting
  • Humectant
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Ethyl L-cysteinate hydrochloride appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • EUCosIngActiveEthyl Cysteinate HCl is the organic compound that conforms to the formula
    • Ethyl Cysteinate HCl is the organic compound that conforms to the formulaSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Humectant.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Humectant.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Ethyl L-cysteinate hydrochloride. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for Ethyl L-cysteinate hydrochloride yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated 2019-12-20

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Ethyl L-cysteinate hydrochloride in a product composition. These are source records, not Greenveil catalog products.

Named organisations

1

Typical roles

Skin protectingHumectant
See products using Ethyl L-cysteinate hydrochloride →