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Pyridostigmine impurities and related standards

Pyridostigmine is held here as a working collection of 21 reference materials across 5 CAS numbers. Within the range, numbered impurities go up to 5. and 1 EP-designated impurities are named explicitly 11 of the entries are impurity-type materials of the parent, 1 carry a deuterium label. 4 entries carry a verified structure drawing, a coverage of 19%; the rest are listed without a structure rather than with an unverified one. 4 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. Storage behaviour differs across a series like this even when the parent is stable. The N-oxides and the hydroxylated analogues are the ones that drift upward on standing, and a certificate that states storage conditions without saying which degradant was monitored leaves the user unable to tell whether a rise on stability is the material or the handling. The mass balance check is the step most often skipped: the sum of the parent assay and the specified impurities should account for the sample, and a series that is incomplete makes that sum look better than it is.

Sources: DailyMed (US NLM) - PYRIDOSTIGMINE BROMIDE TABLET [MAJOR PHARMACEUTICALS].

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

In this group: 2 general reference standards · 1 fine chemical · 1 pharmaceutical intermediate · 1 stable isotope labelled standard. CAS numbers are listed for 5 of 5; 5 entries carry a structure drawing.

On this page

5 reference standards

All entries — structure, identifiers and pack sizes

5 reference standards

Frequently asked

How many Pyridostigmine-related reference standards do you hold?
5 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 5 of them and 5 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Pyridostigmine 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 Pyridostigmine 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 Pyridostigmine 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.