Impurity reference standards
Guanine impurity standards
This page brings together 3 Guanine related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 1 metabolite or hydroxylated analogue.
3reference materials
1metabolites
Batches are supplied with a certificate of analysis, and the supporting spectra can be sent ahead of a purchase order so your QA team can review them. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.
By impurity type
Metabolites1Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Guanine reference materials
1–3 of 3 standards
Questions
Guanine impurities, answered
What Guanine reference materials are available?
The catalogue currently lists 3 compounds for Guanine, including 1 metabolite or hydroxylated analogue. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Guanine 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 Guanine 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.