C6H5NO2
123.11 g/mol
OtherWarning
ISONICOTINIC ACID
CAS55-22-1EC200-228-2
Category
Other
Compound Class
n.a
Primary Use
Metabolite
Isonicotinic acid is a pyridinemonocarboxylic acid with the carboxy group at position 4 of the pyridine ring. It is recognized as a human metabolite and an algal metabolite.
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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2,6-di-sec-butylphenol
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Not specified
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4,4′-bipyridine
CAS553-26-4
Research compound
Referencestereoisomer of
Isonicotinic Acid-d4
CAS53907-55-4
deuterium-labeled compound for research
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for ISONICOTINIC ACID (CAS 55-22-1) is 2933.39.
HS code (international, 6-digit)
2933.39
EU CN code (8-digit)
2933 39 99
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
pyridine-4-carboxylic acid
InChIKey
TWBYWOBDOCUKOW-UHFFFAOYSA-N
SMILES
C1=CN=CC=C1C(=O)O
Synonyms (26)
- Isoniazid Impurity 2Nicotinic Acid EP Impurity E
- Nicotinic Acid EP Impurity E
- Pyridine-4-carboxylic Acid; Nicotinic Acid Imp. E (EP); Isonicotinic Acid; Isoniazid Impurity A; Nicotinic Acid Impurity E
- .alpha.-Picolinic acid
- 1,4-Dihydroisonicotinic acid
- 4-Carboxypyridine
- 4-Picolinic acid
- 4-Pyridinecarboxylic acid
- Acid, Isonicotinic
- Acide iso-nicotinique
- ISONIAZID IMPURITY A
- ISONICOTINIC ACID
- Pyridine-4-carboxylic acid
- Pyridinecarboxylic acid-(4)
- gamma-Picolinic acid
- gamma-Pyridinecarboxylic acid
- isonicotinic-d4 acid
- isonicotonic acid
- p-Pyridinecarboxylic acid
- pyridine, 4-carboxy-
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