Impurity reference standards
Allopurinol impurities & reference standards
Characterised Allopurinol impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
75reference materials
1isotope-labelled
COAHPLC · NMR · MS on request
Parent API: Allopurinol
315-30-0 · C5H4N4O
![(E/Z)-3-[(2-Cyano-3-ethoxy-3-oxo-1-propenyl)amino]-1H-Pyrazole-4-carboxylic Acid Ethyl Ester chemical structure](/media/structures/GMGGKDVJSPDXNB-UHFFFAOYSA-N.svg)
(E/Z)-3-[(2-Cyano-3-ethoxy-3-oxo-1-propenyl)amino]-1H-Pyrazole-4-carboxylic Acid Ethyl Ester
- CAS
- 321571-07-7
- Formula
- C12H14N4O4
- MW
- 278.26 g/mol
VQ-021497
5-Formamido-1H-imidazole-4-carboxamide hydrochloride
- CAS
- 147156-43-2
- Formula
- C5H7ClN4O2
- MW
- 190.59 g/mol
VQ-035193
Ethyl 2-(2-aminothiazole-4-yl)-2-hydroxyiminoacetate
- CAS
- 64485-82-1
- Formula
- C7H9N3O3S
- MW
- 215.23 g/mol
VQ-039136
FAQs — Allopurinol impurities
Which Allopurinol impurities do you supply?
We list 75 Allopurinol-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Allopurinol impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Allopurinol impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Allopurinol impurity standards
We reply within one business day with price, pack options, lead time and documentation.