Allopurinol EP Impurity A

Name: Allopurinol EP Impurity A
Brand: Vaqora Chemicals
SKU: VQ-021492

About Allopurinol EP Impurity A

Allopurinol EP Impurity A (CAS 5334-31-6) is a pharmacopeial impurity of Allopurinol offered by Vaqora Chemicals. Its molecular formula is C4H6N4O and its molecular weight is 126.12 g/mol. The IUPAC name is 5-amino-1H-pyrazole-4-carboxamide. Common synonyms include Allopurinol EP Impurity A (Free Base) and Allopurinol - Impurity A (Freebase).

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. It carries the GHS signal word “Warning” with 6 hazard statements. Review the Safety Data Sheet before use.

As a characterised impurity of Allopurinol, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Allopurinol EP Impurity A is dispatched with a Certificate of Analysis (COA) to destinations 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 A
Catalogue No.	VQ-021492
CAS Number	5334-31-6
IUPAC name	5-amino-1H-pyrazole-4-carboxamide
Molecular formula	C₄H₆N₄O
Molecular weight	126.12 g/mol
Exact mass	126.0542
Grade	Reference Standard
HSN code	38229090
InChIKey	LEFSNWUSTYESGC-UHFFFAOYSA-N
SMILES	C1=NNC(=C1C(=O)N)N
PubChem CID	79254

Physical properties
Physical form	Solid
LogP (XLogP3)	-0.7
H-bond donors / acceptors	3 / 3
TPSA	97.8 Å²
Synonyms	Allopurinol EP Impurity A (Free Base), Allopurinol EP Impurity A, allopurinol USP rc a, Allopurinol - Impurity A (Freebase), 3-Amino-1H-pyrazole-4-carboxamide, 1H-Pyrazole-4-carboxamide, 3-amino-, 3-Amino-4-carbamoylpyrazole, 3-Amino-pyrazole-4-carboxylic acid amide, 5-Amino-1H-pyrazole-4-carboxylic acid amide, 3-amino-2H-pyrazole-4-carboxamide, 5-aminopyrazole-4-carboxamide, [1,4']Bipiperidinyl-3-carboxylic acid ethyl esterdihydrochloride

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P317, P319, P321, P330, 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 Allopurinol EP Impurity A?

The CAS Registry Number of Allopurinol EP Impurity A is 5334-31-6. It is also known as Allopurinol EP Impurity A (Free Base), Allopurinol EP Impurity A, allopurinol USP rc a.

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

Allopurinol EP Impurity A has the molecular formula C4H6N4O and a molecular weight of 126.12 g/mol. Its IUPAC name is 5-amino-1H-pyrazole-4-carboxamide.

What is Allopurinol EP Impurity A used for?

Allopurinol EP Impurity A 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 A can I order?

We supply Allopurinol EP Impurity A 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 A?

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

Yes. Allopurinol EP Impurity A 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.