C9H8O4
180.16 g/mol
Pharmaceutical IntermediateWarning
4-Hydroxyphenylpyruvic acid
CAS156-39-8EC205-852-9
Category
Pharmaceutical Intermediate
Compound Class
Organic Acid
Primary Use
Pharmaceutical Intermediate
4-Hydroxyphenylpyruvic acid is a metabolic intermediate in the degradation of the amino acid phenylalanine. It is formed from tyrosine via the action of tyrosine aminotransferase and is a key compound in phenylalanine metabolism.
metabolic intermediate in phenylalanine degradationresearch compound for phenylalanine metabolism studies
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Hydroxyphenylpyruvic acid (CAS 156-39-8) is 2918.99.
HS code (international, 6-digit)
2918.99
EU CN code (8-digit)
2918 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
3-(4-hydroxyphenyl)-2-oxopropanoic acid
InChIKey
KKADPXVIOXHVKN-UHFFFAOYSA-N
SMILES
C1=CC(=CC=C1CC(=O)C(=O)O)O
Synonyms (41)
- 4HPPA
- ENO
- HPPA
- (p-Hydroxyphenyl)pyruvate
- 3-(p-Hydroxyphenyl)pyruvate
- 4-Hydroxyphenylpyruvic acid
- 4-hydroxyphenylpyruvate
- 4-ydroxyphenylpyruvic acid
- Testacid
- Testacide
- hydroxyphenylpyruvate
- p-Hydroxyphenylpyruvic acid
- p-hydroxyphenylpyruvic
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