C6H6N4O
150.14 g/mol
Pharmaceutical IntermediateWarning
5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol
CAS2503-56-2EC219-706-7
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
This compound is a triazolopyrimidinone derivative used as an intermediate in pharmaceutical manufacturing. It features a heterocyclic structure with both aromatic rings and a ketone functional group.
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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pharmaceutical intermediate
ReferenceSame Category
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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 5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol (CAS 2503-56-2) is 2933.59.
HS code (international, 6-digit)
2933.59
EU CN code (8-digit)
2933 59 95
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-methyl-1H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one
InChIKey
INVVMIXYILXINW-UHFFFAOYSA-N
SMILES
CC1=CC(=O)N2C(=N1)N=CN2
Synonyms (34)
- Trapidil EP Impurity A
- Trapidil impurity A, European Pharmacopoeia (EP)
- Trapidil impurity A
- Trapidil impurity A CRS
- US10975084, Example 8-4
- s-Triazolo[1, 5-methyl-
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