Skip to content
Technical & commercial enquiries: sales@rssechem.com Certificate of analysis issued per lot · Worldwide shipping
Register Request a quote & Contact us

Neomycin impurities and related standards

Neomycin is held here as a working collection of 30 reference materials across 14 CAS numbers. Within the range, the lettered series reaches G. and numbered impurities go up to 6 14 of the entries are impurity-type materials of the parent, 10 are salt or counter-ion variants and 1 carry a deuterium label. 13 entries carry a verified structure drawing, a coverage of 43%; the rest are listed without a structure rather than with an unverified one. 13 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 17 remain tier C and are kept for search coverage. For a peptide the impurity families are the families of synthesis: deletion sequences from incomplete coupling, epimers at the residues whose alpha proton is acidic enough to be lost, oxidation of methionine, and deamidation of asparagine. For a laboratory setting specifications, the workable sequence is to fix the impurity list from the monograph and the degradation study first, and only then to source the standards, because the list determines which materials are worth holding.

Sources: DailyMed (US NLM) - NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISONE OTIC (NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISON.

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

In this group: 5 general reference standards · 5 impurity reference standards · 3 fine chemicals · 1 drug metabolite standard. CAS numbers are listed for 14 of 14; 14 entries carry a structure drawing.

On this page

14 reference standards

All entries — structure, identifiers and pack sizes

14 reference standards

Frequently asked

How many Neomycin-related reference standards do you hold?
14 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 14 of them and 14 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Neomycin 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 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 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.