C3H4ClN3O
133.54 g/mol
Pharmaceutical IntermediateDanger
5-Chloromethyl-2H-1,2,4-triazolin-3-one
CAS252742-72-6EC607-678-2
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
This compound is a pharmaceutical intermediate containing a triazolone ring with a chloromethyl substituent. It is primarily used as a building block in the synthesis of active pharmaceutical ingredients.
Pharmaceutical intermediate
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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ReferenceSame Category
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pharmaceutical intermediate
ReferenceSame Category
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Referencesame scaffold
Amicarbazone
CAS129909-90-6
Herbicide for field corn
Referencesame scaffold
2,4-Dihydro-5-methoxy-4-methyl-3H-1,2,4-triazol-3-one
CAS135302-13-5
herbicide metabolite
Safety Reference
Danger
H290May be corrosive to metals
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H351Suspected of causing cancer
Customs Tariff Classification
The international HS code for 5-Chloromethyl-2H-1,2,4-triazolin-3-one (CAS 252742-72-6) is 2933.99.
HS code (international, 6-digit)
2933.99
EU CN code (8-digit)
2933 99 80
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-(chloromethyl)-1,4-dihydro-1,2,4-triazol-5-one
InChIKey
ZLRBJVJEQXBAAI-UHFFFAOYSA-N
SMILES
C(C1=NNC(=O)N1)Cl
Synonyms (15)
- Fosaprepitant Impurity R
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