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Impurity reference standards

Aspirin impurity standards

Zemixal lists 6 reference materials related to Aspirin, covering the drug substance itself, its process impurities and the products it forms on storage. Among them are 2 pharmacopoeial impurities, 3 isotope-labelled standards and 2 metabolites or hydroxylated analogues.

6reference materials
2pharmacopoeial
3isotope labelled
2metabolites

Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. Typical uses are method development and validation, relative response factor work, forced degradation studies and the impurity sections of ANDA, DMF or CEP filings.

By impurity type

Pharmacopoeial2EP, USP, BP or JP named impurities
Isotope labelled3Deuterated, 13C or 15N internal standards
Metabolites2Hydroxy, desmethyl and conjugated forms

Counts are based on product names. One compound can fall into more than one type.

All Aspirin reference materials

Questions

Aspirin impurities, answered

How many Aspirin impurity standards does Zemixal list?
The catalogue currently lists 6 compounds for Aspirin, including 2 pharmacopoeial impurities, 3 isotope-labelled standards and 2 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 Aspirin 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 Aspirin 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 Aspirin standards available?
Yes. 3 stable-isotope labelled compounds are listed, suitable as internal standards for LC-MS bioanalysis and trace impurity quantitation.
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