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

Desogestrel impurities and related standards

Desogestrel is held here as a working collection of 33 reference materials across 7 CAS numbers. Within the range, the lettered series reaches B; numbered impurities go up to 5. and 2 EP-designated impurities are named explicitly 19 of the entries are impurity-type materials of the parent, 4 carry a deuterium label. 7 entries carry a verified structure drawing, a coverage of 21%; the rest are listed without a structure rather than with an unverified one. 7 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. Relative response factors are what decide whether a percentage on a chromatogram means anything. Impurities that lack a chromophore, or whose ultraviolet maximum sits away from the detection wavelength used for the parent, under-respond by a factor that has to be established with a solution of the standard itself rather than assumed. 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) - DESOGESTREL AND ETHINYL ESTRADIOL AND ETHINYL ESTRADIOL KIT [APOTEX CORP.].

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

In this group: 5 impurity reference standards · 2 fine chemicals. CAS numbers are listed for 7 of 7; 7 entries carry a structure drawing.

On this page

7 reference standards

All entries — structure, identifiers and pack sizes

7 reference standards

Frequently asked

How many Desogestrel-related reference standards do you hold?
7 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 7 of them and 7 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Desogestrel 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 Desogestrel 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 Desogestrel 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.