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Quinidine impurities and related standards

Quinidine is held here as a working collection of 37 reference materials across 20 CAS numbers. 7 of the entries are impurity-type materials of the parent, 12 are salt or counter-ion variants and 7 carry a deuterium label. 20 entries carry a verified structure drawing, a coverage of 54%; the rest are listed without a structure rather than with an unverified one. 20 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. 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. Anyone comparing two suppliers on this parent should ask the same three questions of each: which letters are held, what the content basis is, and whether the structure on the page was verified against the name rather than copied from it.

Sources: DailyMed (US NLM) - DEXTROMETHORPHAN HYDROBROMIDE AND QUINIDINE SULFATE CAPSULE [TEVA PHARMACEUTICALS, INC.].

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

In this group: 13 fine chemicals · 4 general reference standards · 2 impurity reference standards · 1 chemical reagent. CAS numbers are listed for 22 of 22; 22 entries carry a structure drawing.

On this page

22 reference standards

All entries — structure, identifiers and pack sizes

22 reference standards

Frequently asked

How many Quinidine-related reference standards do you hold?
22 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 22 of them and 22 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Quinidine 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 Quinidine 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 Quinidine 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.