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CAS 7524-52-9 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 5811715/10/2010

METHYL TRYPTOPHANATE HCL

L-Tryptophan, Methyl Ester, Monohydrochloride

METHYL TRYPTOPHANATE HCL is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7524-52-9

CAS 7524-52-9PubChem CID 2734891

Methyl tryptophanate hydrochloride

IUPAC name: methyl (2S)-2-amino-3-(1H-indol-3-yl)propanoate;hydrochloride

Molecular formula: C12H15ClN2O2
Molecular weight: 254.71 g/mol
Exact mass: 254.0822054 Da
Topological polar surface area: 68.1 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 1

Also known as

L-Tryptophan methyl ester hydrochlorideMethyl L-tryptophanate HClEINECS 231-385-5UNII-AU62O6861LAU62O6861LMETHYL TRYPTOPHANATE HCL(S)-Tryptophan Methyl Ester MonohydrochlorideL-TRYPTOPHAN, METHYL ESTER, HYDROCHLORIDE (1:1)

16 more reported names

RefChem:158052L-Tryptophan, methyl ester, monohydrochlorideMETHYL TRYPTOPHANATE HCL [INCI]L-(-)-Tryptophan Methyl Ester HydrochlorideTRYPTOPHAN METHYL ESTER MONOHYDROCHLORIDE(S)-TRYPTOPHAN METHYL ESTER HYDROCHLORIDETRYPTOPHAN, METHYL ESTER, MONOHYDROCHLORIDE, L-231-385-5H-Trp-OMe.HClMethyl L-Tryptophanate HydrochlorideL-TRYPTOPHAN METHYL ESTER HCl(S)-methyl 2-amino-3-(1H-indol-3-yl)propanoate hydrochloridemethyl (2S)-2-amino-3-(1H-indol-3-yl)propanoate hydrochlorideMethyl L-tryptophanate monohydrochlorideAC-8667(L)-tryptophan methyl ester hydrochloride

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External database identifiers

ChEMBL:CHEMBL1222005
EPA DTXSID:DTXSID10226219

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for METHYL TRYPTOPHANATE HCL

INCI name

METHYL TRYPTOPHANATE HCL

Description

L-Tryptophan, Methyl Ester, Monohydrochloride

Record provenance

Inventory reference: 58117
Imported identity: METHYL TRYPTOPHANATE HCL
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for METHYL TRYPTOPHANATE HCL

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Key data

CAS

7524-52-9

231-385-5

Restriction

—

Function

HAIR CONDITIONING: Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#16582 · METHYL TRYPTOPHANATE HCl

Ingredients with overlapping formulation functions

METHYL HYDROXYMETHYL OLEYL OXAZOLINEANTISTATIC, HAIR CONDITIONING

METHYL IMINOOXOTHIAZOLIDINYL ACETAMIDO DIMETHYLTHIOPHENE CARBOXYLATEHAIR CONDITIONING

METHYL TRAVOPROSTHAIR CONDITIONING

METHYL TRIMETHICONEHAIR CONDITIONING, SKIN CONDITIONING, SOLVENT

METHYL TYROSINATE HCLHAIR CONDITIONING

METHYLARACHIDIC ACIDHAIR CONDITIONING

METHYLEICOSAMIDOPROPYL ETHYLDIMONIUM ETHOSULFATEHAIR CONDITIONING

METHYLEUGENYL PEG-8 DIMETHICONEHAIR CONDITIONING, SKIN CONDITIONING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How METHYL TRYPTOPHANATE HCL appears in the CosIng inventory

The CosIng inventory lists METHYL TRYPTOPHANATE HCL as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

METHYL TRYPTOPHANATE HCL is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

METHYL TRYPTOPHANATE HCL is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, METHYL TRYPTOPHANATE HCL carries the following function designation(s):

HAIR CONDITIONING

CAS 7524-52-9 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for METHYL TRYPTOPHANATE HCL

This page reproduces the CosIng inventory entry for METHYL TRYPTOPHANATE HCL from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research METHYL TRYPTOPHANATE HCL and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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