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Rifaximin impurities and related standards

7 reference standards related to Rifaximin held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.

CAS numbers are listed for 7 of 7; 7 entries carry a structure drawing.

Rifaximin — related standards
CompoundCAS No.Catalogue No.FormulaMW
Rifaximin EP Impurity H 1210022-90-4 RS-R045001 C43H51N3O12 801.88
Rifaximin EP Impurity E 13553-79-2 RS-R045002 C37H45NO12 695.75
Rifaximin EP Impurity B 13929-35-6 RS-R045003 C39H49NO14 755.8
Rifaximin EP Impurity F 14487-05-9 RS-R045004 C40H49NO13 751.82
Rifaximin Impurity D(EP),Rifaximin Y 15271-73-5 RS-R045005 C43H49N3O12 799.87
Rifaximin impurity G(EP) 80621-76-7 RS-R045006 C43H49N3O11 783.88
25-Desacetyl Rifaximin 80621-88-1 RS-R045007 C41H49N3O10 743.84

Structures

Frequently asked

How many Rifaximin-related reference standards do you hold?
7 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 7 of them and 7 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Rifaximin impurity that is not listed here?
Yes. Non-compendial impurities can be quoted from a structure — a CAS number is not required. Send the structure, a SMILES string or the parent drug substance with your enquiry and we will come back with availability.
What documentation is supplied with Rifaximin impurities?
Every lot ships with its own certificate of analysis. The certificate records the catalogue number, the batch number, the tests performed, the specification applied and the result obtained for that lot. A safety data sheet is supplied with the shipment.
Do you publish prices or a lead time for Rifaximin impurities?
No price list is published: quotations are prepared per enquiry, because availability and packing depend on the lot and the quantity you need. Send the catalogue number and the quantity and a technical contact will answer with availability and a quotation.

Cannot find the impurity you need? Non-compendial impurities can be quoted from a structure — a CAS number is not required. Write to sales@rssechem.com.