Oxypurinol

Name: Oxypurinol
Brand: Vaqora Chemicals
SKU: VQ-021498

About Oxypurinol

Oxypurinol (CAS 2465-59-0) is an impurity of Allopurinol offered by Vaqora Chemicals. The compound has the formula C5H4N4O2, corresponding to a molecular weight of 152.11 g/mol. The IUPAC name is 1,7-dihydropyrazolo[5,4-d]pyrimidine-4,6-dione. Common synonyms include Oxipurinol and 1H-Pyrazolo[3,4-d]pyrimidine-4,6-diol.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Pharmaceutical QC and development laboratories use this impurity standard of Allopurinol to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Oxypurinol in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Allopurinol

View every impurity, metabolite and intermediate we list for Allopurinol.

Allopurinol impurities

Specifications & identifiers

Chemical identifiers
Product name	Oxypurinol
Catalogue No.	VQ-021498
CAS Number	2465-59-0
IUPAC name	1,7-dihydropyrazolo[5,4-d]pyrimidine-4,6-dione
Molecular formula	C₅H₄N₄O₂
Molecular weight	152.11 g/mol
Exact mass	152.0334
Grade	Reference Standard
HSN code	38229090
InChIKey	HXNFUBHNUDHIGC-UHFFFAOYSA-N
SMILES	C1=NNC2=C1C(=O)NC(=O)N2
PubChem CID	135398752

Physical properties
Physical form	Solid
LogP (XLogP3)	-0.9
H-bond donors / acceptors	3 / 3
TPSA	86.9 Å²
Synonyms	Oxipurinol, 1H-Pyrazolo[3,4-d]pyrimidine-4,6-diol, Alloxanthine, Oxoallopurinol, 1H-Pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione, 1H-Pyrazolo(3,4-d)pyrimidine-4,6-diol, 1,2-dihydropyrazolo[3,4-d]pyrimidine-4,6-dione, 1H-Pyrazolo(3,4-d)pyrimidine,4,6(5H,7H)-dione, 1,7-dihydropyrazolo[3,4-d]pyrimidine-4,6-dione, 1H,4H,5H,6H,7H-pyrazolo[3,4-d]pyrimidine-4,6-dione, 1,2-dihydropyrazolo(3,4-d)pyrimidine-4,6-dione, 1,7-dihydropyrazolo(3,4-d)pyrimidine-4,6-dione

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Oxypurinol?

The CAS Registry Number of Oxypurinol is 2465-59-0. It is also known as Oxipurinol, 1H-Pyrazolo[3,4-d]pyrimidine-4,6-diol, Alloxanthine.

What is the molecular formula and molecular weight of Oxypurinol?

Oxypurinol has the molecular formula C5H4N4O2 and a molecular weight of 152.11 g/mol. Its IUPAC name is 1,7-dihydropyrazolo[5,4-d]pyrimidine-4,6-dione.

What is Oxypurinol used for?

Oxypurinol is supplied as a characterised reference material related to Allopurinol. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Oxypurinol can I order?

We supply Oxypurinol in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Oxypurinol?

Yes. Every lot of Oxypurinol is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Oxypurinol be shipped internationally?

Yes. Oxypurinol is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.