Allopurinol EP Impurity B

Name: Allopurinol EP Impurity B
Brand: Vaqora Chemicals
SKU: VQ-021493

About Allopurinol EP Impurity B

Vaqora Chemicals supplies Allopurinol EP Impurity B, a pharmacopeial impurity of Allopurinol registered under CAS number 22407-20-1. Its molecular formula is C5H6N4O2 and its molecular weight is 154.13 g/mol. Systematically, it is named 5-formamido-1H-pyrazole-4-carboxamide. It is also known as Allopurinol - Impurity B or Allopurinol Impurity B.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Handle it with standard laboratory precautions and appropriate personal protective equipment.

This Allopurinol impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer Allopurinol EP Impurity B in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Industries

Related to Allopurinol

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

Allopurinol impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Allopurinol EP Impurity B
Catalogue No.	VQ-021493
CAS Number	22407-20-1
IUPAC name	5-formamido-1H-pyrazole-4-carboxamide
Molecular formula	C₅H₆N₄O₂
Molecular weight	154.13 g/mol
Exact mass	154.0491
Grade	Reference Standard
HSN code	38229090
InChIKey	MKVXRGIJTKYXPR-UHFFFAOYSA-N
SMILES	C1=NNC(=C1C(=O)N)NC=O
PubChem CID	44819953

Physical properties
Physical form	Solid
LogP (XLogP3)	-0.8
H-bond donors / acceptors	3 / 3
TPSA	101 Å²
Synonyms	Allopurinol - Impurity B, Allopurinol EP Impurity B, allopurinol USP rc b, Allopurinol Impurity B, Pyrazole-4-carboxamide, 3-formamido-, 1H-Pyrazole-4-carboxamide, 3-(formylamino)-, 3-(Formylamino)-1H-pyrazole-4-carboxamide, 5-(formylamino)-1H-pyrazole-4-carboxamide, 3-Formamidopyrazole-4-carboxamide

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 Allopurinol EP Impurity B?

The CAS Registry Number of Allopurinol EP Impurity B is 22407-20-1. It is also known as Allopurinol - Impurity B, Allopurinol EP Impurity B, allopurinol USP rc b.

What is the molecular formula and molecular weight of Allopurinol EP Impurity B?

Allopurinol EP Impurity B has the molecular formula C5H6N4O2 and a molecular weight of 154.13 g/mol. Its IUPAC name is 5-formamido-1H-pyrazole-4-carboxamide.

What is Allopurinol EP Impurity B used for?

Allopurinol EP Impurity B 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 Allopurinol EP Impurity B can I order?

We supply Allopurinol EP Impurity B 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 Allopurinol EP Impurity B?

Yes. Every lot of Allopurinol EP Impurity B 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 Allopurinol EP Impurity B be shipped internationally?

Yes. We export Allopurinol EP Impurity B worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.