Home/Chemicals/60-18-4

Chemical substance record

L-tyrosine

60-18-4C₉H₁₁NO₃181.191 g/mol

Organic/Inorganic Small MoleculeChEBI source record

An optically active form of tyrosine having L-configuration. — ChEBI

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Identity & molecular properties

Source-linked values

CAS number	60-18-4	ChEBI ↗
Molecular formula	C₉H₁₁NO₃	ChEBI ↗
Molar mass	181.191 g/mol	ChEBI ↗
Monoisotopic mass	181.07389 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:17895	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	181.19 g/mol	PubChem ↗
Exact mass	181.07389321 Da	PubChem ↗
Computed XLogP	-2.3	PubChem ↗
Topological polar surface area (Å²)	83.6	PubChem ↗
H-bond donors	3	PubChem ↗
H-bond acceptors	4	PubChem ↗
Rotatable bonds	3	PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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Source preferred name

L-tyrosine

IUPAC name

L-tyrosine

InChIKey

OUYCCCASQSFEME-QMMMGPOBSA-N

SMILES

N[C@@H](Cc1ccc(O)cc1)C(=O)O

InChI

InChI=1S/C9H11NO3/c10-8(9(12)13)5-6-1-3-7(11)4-2-6/h1-4,8,11H,5,10H2,(H,12,13)/t8-/m0/s1

Classification & relationships

ChEBI ontology

L-alpha-amino acidChEBI parent class · 15705 ↗tyrosineChEBI parent class · 18186 ↗erythrose 4-phosphate/phosphoenolpyruvate family amino acidChEBI parent class · 73690 ↗proteinogenic amino acidChEBI parent class · 83813 ↗

carboxylic acid amino acid organic molecular entity

Roles recorded in ChEBI

micronutrientnutraceuticalEC 1.3.1.43 (arogenate dehydrogenase) inhibitorfundamental metabolite

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00551904 mol

Uses 181.191 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions

C

Carbon · 9 atoms

59.66%

O

Oxygen · 3 atoms

26.49%

N

Nitrogen · 1 atom

7.73%

H

Hydrogen · 11 atoms

6.12%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

A core catalytic domain of the TyrA protein family: arogenate dehydrogenase from Synechocystis. ↗The Biochemical journal · 2004 Aug 15 · PMID 15171683

Simultaneous determination of L-cysteine and L-tyrosine using Au-nanoparticles/poly-eriochrome black T film modified glassy carbon electrode. ↗Bioelectrochemistry (Amsterdam, Netherlands) · 2012 Aug · PMID 22360849

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:17895

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

Additional molecular descriptorsNCBI PubChem · CID 6057 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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