Impurity reference standards
Rifaximin impurity standards
For Rifaximin, the Zemixal catalogue holds 10 impurity and reference standards that support release testing, stability programmes and regulatory dossiers. Counted by type, there are 2 pharmacopoeial impurities and 1 degradation product.
10reference materials
2pharmacopoeial
1degradants
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. 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
Pharmacopoeial2EP, USP, BP or JP named impurities
Degradants1N-oxides, dimers, lactones and breakdown products
Counts are based on product names. One compound can fall into more than one type.
All Rifaximin reference materials
1–10 of 10 standards
Questions
Rifaximin impurities, answered
What Rifaximin reference materials are available?
The catalogue currently lists 10 compounds for Rifaximin, including 2 pharmacopoeial impurities and 1 degradation product. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Rifaximin 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 Rifaximin 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.