C9H10O3
166.17 g/mol
Pharmaceutical IntermediateWarning
TROPIC ACID
CAS552-63-6EC208-465-3
Category
Pharmaceutical Intermediate
Compound Class
Organic Acid
Primary Use
Pharmaceutical Intermediate
Tropic acid is a chemical compound used as an intermediate in the synthesis of anticholinergic alkaloids such as atropine and hyoscyamine. It exists as a racemic mixture or as a single enantiomer and features both a carboxylic acid and an alcohol functional group.
Intermediate for atropine synthesisIntermediate for hyoscyamine synthesisLaboratory reagent
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
ReferenceSame Category
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pharmaceutical intermediate
ReferenceSame Category
3-Methyl-7-propylxanthine
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pharmaceutical intermediate
ReferenceSame Category
3-Fluoro-4-chlorotoluene
CAS5527-94-6
pharmaceutical intermediate
Referencestereoisomer of
Tropic acid
CAS529-64-6
pharmaceutical intermediate
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for TROPIC ACID (CAS 552-63-6) is 2918.19.
HS code (international, 6-digit)
2918.19
EU CN code (8-digit)
2918 19 98
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-hydroxy-2-phenylpropanoic acid
InChIKey
JACRWUWPXAESPB-UHFFFAOYSA-N
SMILES
C1=CC=C(C=C1)C(CO)C(=O)O
Synonyms (53)
- Atropine Sulfate EP Impurity C; Tropicamide EP Impurity C; Hyoscine EP Impurity C; Hyoscine Hydrobromide EP Impurity D; Hyoscine Butylbromide EP Impurity B
- Hyoscine Butylbromide EP Impurity B
- Ipratropium Bromide EP Impurity C
- Tropicamide EP Impurity C
- Tropicamide impurity C, European Pharmacopoeia (EP)
- (+-)-Tropate
- 2-Phenylhydracrylic acid
- 2-phenylhydracrylate
- 3-Hydroxy-2-phenylpropionate
- ATROPINE SULFATE IMPURITY C
- Hydracrylic acid, 2-phenyl-
- Racemic tropic acid
- TROPIC ACID
- TROPICAMIDE IMPURITY C
- Tropic acid (Standard)
- Tropic acid, (+-)-isomer
- Tropic acid, (R)-isomer
- Tropic acid, (S)-isomer
- Tropicamide impurity C CRS
- a-Phenyl-b-hydroxypropionate
- alpha-Phenylhydracrylic acid
- b-Hydroxyhydratropate
- b-Hydroxyhydratropic acid
- beta-Hydroxyhydratropate
- beta-hydroxyhydratropic acid
- di-Tropic acid
- dl-Tropic acid
- tropasaure
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