C4H6N4O
126.12 g/mol
Pharmaceutical IntermediateWarning
3-Amino-1H-pyrazole-4-carboxamide
CAS5334-31-6EC226-252-3
Category
Pharmaceutical Intermediate
Compound Class
Amine
Primary Use
Pharmaceutical Intermediate
3-Amino-1H-pyrazole-4-carboxamide is a pyrazole derivative featuring an amide and an amino substituent on the heterocyclic ring. It is primarily used as a reference standard or intermediate in the synthesis and quality control of allopurinol impurities.
pharmaceutical intermediate for allopurinol impurity synthesisreference standard for analytical testing in pharmaceutical manufacturing
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
StrongSame Parent
3-Amino-4-pyrazolecarboxamide hemisulfate
CAS27511-79-1
pharmaceutical intermediate
ReferenceSame Category
4-Nitropyrazole-3-carboxylic acid
CAS5334-40-7
pharmaceutical intermediate
ReferenceSame Category
Boc-N-methyl-L-leucine
CAS53363-89-6
pharmaceutical intermediate
ReferenceSame Category
4-Nitrophenethyl bromide
CAS5339-26-4
pharmaceutical intermediate
ReferenceSame Category
(+)-phenylacetyl carbinol
CAS53439-91-1
pharmaceutical intermediate
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 3-Amino-1H-pyrazole-4-carboxamide (CAS 5334-31-6) is 2933.19.
HS code (international, 6-digit)
2933.19
EU CN code (8-digit)
2933 19 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
5-amino-1H-pyrazole-4-carboxamide
InChIKey
LEFSNWUSTYESGC-UHFFFAOYSA-N
SMILES
C1=NNC(=C1C(=O)N)N
Synonyms (19)
- 3-Amino-1H-pyrazole-4-carboxamide; 3-Amino-4-carbamoylpyrazole; 3-Amino-4-pyrazolecarboxamide; NSC 1402; Allopurinol EP Impurity A
- ALLOPURINOL IMPURITY A (EP IMPURITY)
- Allopurinol EP Impurity A
- (R)-Modafinil-d10 Carboxylate
- 3-AMINO-4-PYRAZOLECARBOXAMIDE
- 3-AMINOPYRAZOLE-4-CARBOXAMIDE
- 3-Amino-4-carbamoylpyrazole
- 5-AMINO-4-PYRAZOLECARBOXAMIDE
- 5-aminopyrazole-4-carboxamide
- ALLOPURINOL IMPURITY A
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