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Neomycin Sulfate impurities and related standards

Neomycin Sulfate is held here as a working collection of 24 reference materials across 11 CAS numbers. Within the range, the lettered series runs from A to G with 5 letters present; numbered impurities go up to 7. and 4 EP-designated impurities are named explicitly 22 of the entries are impurity-type materials of the parent, 24 are salt or counter-ion variants. 11 entries carry a verified structure drawing, a coverage of 46%; the rest are listed without a structure rather than with an unverified one. 11 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 13 remain tier C and are kept for search coverage. Peptide entries behave differently from small molecules in every analytical respect: they adsorb to surfaces, they aggregate, and they elute as broad peaks unless the method uses an ion-pairing agent. 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) - NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISONE OTIC (NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISON.

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

In this group: 10 impurity reference standards · 3 fine chemicals. CAS numbers are listed for 13 of 13; 13 entries carry a structure drawing.

On this page

13 reference standards

All entries — structure, identifiers and pack sizes

13 reference standards

Frequently asked

How many Neomycin Sulfate-related reference standards do you hold?
13 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 13 of them and 13 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Neomycin Sulfate 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 Neomycin Sulfate 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 Neomycin Sulfate 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.