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Chloroquine impurities and related standards

Chloroquine is held here as a working collection of 49 reference materials across 23 CAS numbers. 7 of the entries are impurity-type materials of the parent, 17 are salt or counter-ion variants and 11 carry a deuterium label and 3 are nitrosamine analogues. 23 entries carry a verified structure drawing, a coverage of 47%; the rest are listed without a structure rather than with an unverified one. 23 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 26 remain tier C and are kept for search coverage. The labelled members of this group are used as internal standards, which puts the isotopic distribution at the centre of the specification rather than at its edge: the label position and the enrichment have to be stated, and a co-eluting unlabelled fraction changes the result even when the chemical purity looks acceptable. 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) - CHLOROQUINE PHOSPHATE TABLET [AMNEAL PHARMACEUTICALS OF NEW YORK LLC].

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

In this group: 11 stable isotope labelled standards · 7 fine chemicals · 6 impurity reference standards · 3 drug metabolite standards. CAS numbers are listed for 32 of 32; 32 entries carry a structure drawing.

On this page

32 reference standards

All entries — structure, identifiers and pack sizes

32 reference standards

Frequently asked

How many Chloroquine-related reference standards do you hold?
32 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 32 of them and 32 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Chloroquine 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 Chloroquine 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 Chloroquine 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.