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Monensin impurities and related standards

Monensin is held here as a working collection of 12 reference materials across 9 CAS numbers. Within the range, numbered impurities go up to 7. 5 of the entries are impurity-type materials of the parent, 2 are salt or counter-ion variants. 7 entries carry a verified structure drawing, a coverage of 58%; the rest are listed without a structure rather than with an unverified one. 7 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 5 remain tier C and are kept for search coverage. Forced degradation on the parent tells you which of these materials a method will actually encounter: hydrolytic stress generates the amide and ester cleavage products, oxidative stress generates the N-oxides and hydroxylated analogues, and photolytic stress generates the ring rearrangements. A standard that is not on that list is usually a process impurity, and it is controlled by the route rather than by the formulation. Where a letter exists in a monograph but not in a supplier catalogue, that gap is what stops a validation study, and it is worth asking for the letter rather than for a percentage.

Sources: DailyMed (US NLM) - MONENSIN SODIUM POWDER [ELANCO US INC.].

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

In this group: 4 fine chemicals · 3 impurity reference standards. CAS numbers are listed for 7 of 7; 7 entries carry a structure drawing.

On this page

7 reference standards

All entries — structure, identifiers and pack sizes

  • Monensin sodium

    CAS 22373-78-0C36H61NaO11

    MW 692.9

    BACK ORDERRS-U094204

  • Monensin A

    CAS 17090-79-8C36H62O11

    MW 670.88

    IN STOCKRS-U094163

  • Monensin B

    CAS 30485-16-6C35H60O11

    MW 656.8

    CUSTOM SYNTHESISRS-U094244

  • Monensin C

    CAS 31980-87-7C37H64O11

    MW 684.91

    BACK ORDERRS-U094648

  • Monensin Impurity 3

    CAS 164066-23-3C46H82O11

    MW 811.15

    BACK ORDERRS-M468001

  • Monensin Impurity 4

    CAS 28636-21-7C37H64O11

    MW 684.91

    BACK ORDERRS-M468002

  • Monensin Impurity 6

    CAS 127648-49-1C43H68O11

    MW 761.01

    CUSTOM SYNTHESISRS-M468003

7 reference standards

Frequently asked

How many Monensin-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 Monensin 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 Monensin 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 Monensin 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.