Impurity reference standards
Allopurinol impurity standards
This page brings together 130 Allopurinol related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 6 pharmacopoeial impurities, 1 isotope-labelled standard and 8 metabolites or hydroxylated analogues.
130reference materials
6pharmacopoeial
1isotope labelled
8metabolites
Each lot ships with a certificate of analysis, and characterisation data such as 1H-NMR, mass spectrum and HPLC purity can be shared before you order. Laboratories use them to validate related-substance methods, set specification limits under ICH Q3A and Q3B, and identify unknown peaks in stability samples.
By impurity type
Pharmacopoeial6EP, USP, BP or JP named impurities
Isotope labelled1Deuterated, 13C or 15N internal standards
Metabolites8Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Allopurinol reference materials
1–60 of 130 standards
(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
ZX-020549
(R)-Tert-Butyl 3-(bromomethyl)piperidine-1-carboxylate
- CAS
- 1002359-91-2
- Formula
- C11H20BrNO2
- MW
- 278.19 g/mol
ZX-043957
1-(Oxan-2-yl)-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
- CAS
- 1003846-21-6
- Formula
- C14H23BN2O3
- MW
- 278.16 g/mol
ZX-043968
2-[1-(4-Cyano-1,2,3,4-tetrahydronaphthyl)]propanenitrile
- CAS
- 57964-39-3
- Formula
- C14H14N2
- MW
- 210.27 g/mol
ZX-041158
3-Chloro-2-morpholinopyridine-4-boronic acid
- CAS
- 957061-04-0
- Formula
- C9H12BClN2O3
- MW
- 242.47 g/mol
ZX-043108
3-Ethoxythiocarbonylsulfamylphenyl Acetic Acid
- CAS
- 887354-92-9
- Formula
- C11H13NO5S2
- MW
- 303.4 g/mol
ZX-043100
Questions
Allopurinol impurities, answered
What Allopurinol reference materials are available?
The catalogue currently lists 130 compounds for Allopurinol, including 6 pharmacopoeial impurities, 1 isotope-labelled standard and 8 metabolites or hydroxylated analogues. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Allopurinol impurity standard?
A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.
Can Zemixal make a Allopurinol impurity that is not listed?
Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.
Are isotope-labelled Allopurinol standards available?
Yes. 1 stable-isotope labelled compound is listed, suitable as internal standards for LC-MS bioanalysis and trace impurity quantitation.