murphyTyrosine
AKA: L-tyrosine, 60-18-4, (S)-Tyrosine, P-Tyrosine, (2S)-2-amino-3-(4-hydroxyphenyl)propanoic acid, L-p-Tyrosine, 4-Hydroxy-L-phenylalanine, Tirosina, Tyrosinum
Synthetic
Skin Conditioner
Hair Care
Clean
OriginTyrosine is a non-essential amino acid belonging to the aromatic amino acid chemical family, typically synthesized from phenol and other organic precursors. It is produced through fermentation processes or chemical synthesis via catalytic conversion of simple organic compounds.
2-Amino-3-(4-hydroxyphenyl)propanoic acid
Solubility 479
Formula
C9H11NO3
Mol. Weight
181.19
CAS #
556-02-5, 556-03-6, 60-18-4
State
Solid; [Merck Index] White fine crystals and fragments; [Sigma-Aldrich MSDS]
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Antistatic
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not Phototoxic
Lab (in vitro) test found no phototoxicity in the CIR safety assessment (CIR 607)
Not a Skin Irritant
1 study / 1 not irritating (CIR 607)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 607)
Mixed Eye Irritation Results
3 studies / 2 irritating / 1 not irritating / reactions slight (CIR 607)
Concentration Guide
Leave-on0.0009–1%
Rinse-off0.0005–0.001%
0%50%100%
CIR reported use · report published 2013
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR