Impurity reference standards
Closantel impurity standards
This page brings together 6 Closantel related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 3 pharmacopoeial impurities and 1 isotope-labelled standard.
6reference materials
3pharmacopoeial
1isotope labelled
Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.
By impurity type
Pharmacopoeial3EP, USP, BP or JP named impurities
Isotope labelled1Deuterated, 13C or 15N internal standards
Counts are based on product names. One compound can fall into more than one type.
All Closantel reference materials
1–6 of 6 standards
Questions
Closantel impurities, answered
What Closantel reference materials are available?
The catalogue currently lists 6 compounds for Closantel, including 3 pharmacopoeial impurities and 1 isotope-labelled standard. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Closantel 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 Closantel 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 Closantel standards available?
Yes. 1 stable-isotope labelled compound is listed, suitable as internal standards for LC-MS bioanalysis and trace impurity quantitation.