Tyrosine Chemical formula
Synonyms: Tirosina; Tirozin; Tirozinas; Tyr; Tyrosiini; Tyrosin; L-Tyrosine; Tyrosinum; Tyrozyna; Y. acid.
Cyrillic synonym: Тирозин.

💊 Chemical information

Chemical formula: C9H11NO3 = 181.2.
CAS — 60-18-4.


In Chin., Eur., and US.

Ph. Eur. 6.2

(Tyrosine). A white or almost white, crystalline powder or colourless crystals. Very slightly soluble in water; practically insoluble in alcohol. It dissolves in dilute mineral acids and in dilute solutions of alkali hydroxides. Protect from light.

USP 31

(Tyrosine). White, odourless crystals or crystalline powder. Very slightly soluble in water; insoluble in alcohol and in ether.

💊 Profile

Tyrosine is an aromatic non-essential amino acid. It is used as a dietary supplement.


Tyrosine was not an effective alternative to a diet low in phenylalanine in patients with phenylketonuria, see under Amino Acid Metabolic Disorders.

💊 Preparations

Proprietary Preparations

Multi-ingredient: Austral.: Aussie Tan Pre-Tan; Bioglan Zellulean with Escin; Tyroseng†; India: Placentrex; Port.: Rilastil Dermo Solar.
Published January 30, 2019.