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API

Allopurinol

Allopurinol is listed in the Vencilla catalogue as an active pharmaceutical ingredient for business-to-business sourcing enquiries. Molecular formula C5H4N4O; molecular weight 136.11 g/mol (PubChem CID 135401907). Share the required grade, specification, quantity, documentation and destination market with your enquiry.

Product overview

Product type
API
Type
API
Vencilla ID
PRD-100027

Chemical identity

CAS number
315-30-0
Molecular formula
C5H4N4O
Molecular weight
136.11 g/mol
Synonyms
Allopurinolum; allopurinolo
IUPAC name
1,5-dihydropyrazolo[5,4-d]pyrimidin-4-one
PubChem CID
135401907 (opens PubChem in a new tab)
InChIKey
OFCNXPDARWKPPY-UHFFFAOYSA-N

Reference properties

Physical description
4-hydroxypyrazolo(3,4-d)pyrimidine is an odorless tasteless white microcrystalline powder. (NTP, 1992) (CAMEO Chemicals, US NOAA)
Colour / form
FLUFFY WHITE TO OFF-WHITE POWDER (Hazardous Substances Data Bank (HSDB), US National Library of Medicine)
Melting point
greater than 662 °F (NTP, 1992) (CAMEO Chemicals, US NOAA)
Solubility
less than 1 mg/mL at 64 °F (NTP, 1992) (CAMEO Chemicals, US NOAA)

Published literature values for the substance, with their source. They are not a specification of supplied material; the specification for each supply is confirmed with the enquiry.

Technical specification

Product specifications (salt or form, grade and pack) are confirmed for each enquiry during qualification.

References

Reference information researched 2026-10-14.

Documentation

Documentation requirements are reviewed for each enquiry during qualification.

Market compliance

Regulatory, import and registration requirements depend on the destination market and the intended use, and are reviewed for each enquiry. This record does not indicate approval, registration or authorisation in any market.

Pharmaceutical sourcing disclaimer

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