C8H6O5
182.13 g/mol
Industrial ChemicalWarning
4-Hydroxyisophthalic acid
CAS636-46-4EC211-258-0
Category
Industrial Chemical
Compound Class
Organic Acid
Primary Use
chemical intermediate for synthesis
4-Hydroxyisophthalic acid is a 2-hydroxyisophthalic acid. It is a chemical intermediate used primarily in synthesis applications.
chemical intermediate for synthesis
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
SimilarStructure SimilarSimilarity 0.73
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pharmaceutical intermediate
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polyester monomer intermediate
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solvent and flavoring agent
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CAS6375-27-5
chemical intermediate for dyes
ReferenceSame Category
Pentanoyl chloride
CAS638-29-9
chemical intermediate for large scale chemicals
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Hydroxyisophthalic acid (CAS 636-46-4) is 2918.29.
HS code (international, 6-digit)
2918.29
EU CN code (8-digit)
2918 29 00
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
4-hydroxybenzene-1,3-dicarboxylic acid
InChIKey
BCEQKAQCUWUNML-UHFFFAOYSA-N
SMILES
C1=CC(=C(C=C1C(=O)O)C(=O)O)O
Synonyms (20)
- 4-HIPA
- Aspirin Impurity B ; Acetylsalicylic Acid EP Impurity B
- Salicylic acid impurity B, European Pharmacopoeia (EP)
- 4-Hydroxy-m-phthalic acid
- 4-Hydroxyisophthalic acid
- 4-Hydroxyisopthalic acid
- 4-hydroxyisophtalic acid
- 4-hydroxyisophthalate
- Aspirin Impurity 2
- Eupirina
- Isophthalic acid, 4-hydroxy-
- SALICYLIC ACID IMPURITY B
- Salicylic acid impurity B CRS
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