Official EU label nameGlossary entry 29547

TRYPTOPHAN

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence

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Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:54-12-673-22-3

EC:200-194-9200-795-6

Ingredient index records:

TRYPTOPHAN

Cosmetic functions: ANTISTATIC, FRAGRANCE, HAIR CONDITIONING

2-Amino-3-indol-3-ylpropanoic acid

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2 matched or reported names

TRYPTOPHANtryptophan

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name TRYPTOPHAN.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 54-12-6

CAS 54-12-6PubChem CID 1148

Dl-Tryptophan

Tryptophan is an alpha-amino acid that is alanine bearing an indol-3-yl substituent at position 3. It has a role as a Daphnia magna metabolite. It is a polar amino acid, an alpha-amino acid, an aromatic amino acid and an aminoalkylindole. It contains a 1H-indol-3-ylmethyl group. It is a conjugate base of a tryptophanium. It is a conjugate acid of a tryptophanate. It is a tautomer of a tryptophan zwitterion. — ChEBI

IUPAC name: 2-amino-3-(1H-indol-3-yl)propanoic acid

Molecular formula: C11H12N2O2
Molecular weight: 204.22 g/mol
Exact mass: 204.089877630 Da
XLogP3: -1.1
Topological polar surface area: 79.1 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 0

Also known as

(+-)-TryptophanTryptophan, DLTRYPTOPHAN, DL-CCRIS 719NSC 13118EINECS 200-194-9AI3-24395X9U7434L7A

16 more reported names

NSC-13118DL-TRYPTOPHAN [FCC]DLTrytophaneDL3betaIndolylalanineRefChem:589984DLalphaAmino3indolepropionic acid200-194-9DL-TrytophanRacemic TryptophanDL-TrytophaneH-DL-Trp-OHDL-tryptophaned,l-tryptophanDL-alpha-Amino-3-indolepropionic acidDL-.alpha.-Amino-3-indolepropionic acid(+/-)-alpha-Amino-3-indolepropionic acid

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External database identifiers

ChEBI:CHEBI:27897
ChEMBL:CHEMBL484901
EPA DTXSID:DTXSID0021418
PubMed:22992800
PubMed:22760664
PubMed:22471215
PubMed:21962650
PubMed:21681321
PubMed:21591787
PubMed:21583152
PubMed:21221920
PubMed:21076782
PubMed:20537435
PubMed:20054706
PubMed:19800855

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

PubChem 2D chemical structure for CAS 73-22-3

CAS 73-22-3PubChem CID 6305

L-Tryptophan

L-tryptophan is the L-enantiomer of tryptophan. It has a role as a micronutrient, an antidepressant, a nutraceutical, a mouse metabolite, a Saccharomyces cerevisiae metabolite, a plant metabolite, an Escherichia coli metabolite and a human metabolite. It is a L-alpha-amino acid, a tryptophan, an erythrose 4-phosphate/phosphoenolpyruvate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-tryptophanium. It is a conjugate acid of a L-tryptophanate. It is an enantiomer of a D-tryptophan. It is a tautomer of a L-tryptophan zwitterion. — ChEBI

IUPAC name: (2S)-2-amino-3-(1H-indol-3-yl)propanoic acid

Molecular formula: C11H12N2O2
Molecular weight: 204.22 g/mol
Exact mass: 204.089877630 Da
XLogP3: -1.1
Topological polar surface area: 79.1 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 1

Also known as

tryptophanL-TryptophaneTryptophane(S)-TryptophantrofantryptacinArdeytropinPacitron

16 more reported names

Indole-3-alanineL-TryptofanL-TrpL-(-)-TryptophanL-beta-3-Indolylalanine3-Indol-3-ylalaninetriptofano(-)-Tryptophan1-beta-3-IndolylalanineTryptophan, L-1H-Indole-3-alanineTryptophanum1beta-3-Indolylalanine2-Amino-3-indolylpropanoic acidTryptophanum [Latin](L)-TRYPTOPHAN

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External database identifiers

ChEBI:CHEBI:16828
ChEMBL:CHEMBL54976
EPA DTXSID:DTXSID5021419
PubMed:29968805
PubMed:26349500
PubMed:24826842
PubMed:23124343
PubMed:23114508
PubMed:23113206
PubMed:23109963
PubMed:23109825
PubMed:23109729
PubMed:23107720
PubMed:23100807
PubMed:23097747

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

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 US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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