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Umeclidinium impurities and related standards

Umeclidinium is held here as a working collection of 9 reference materials across 1 CAS numbers. 3 of the entries are impurity-type materials of the parent. 2 entries carry a verified structure drawing, a coverage of 22%; the rest are listed without a structure rather than with an unverified one. 2 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 7 remain tier C and are kept for search coverage. Each of these materials is normally supplied with its own chromatographic purity and its own content basis, and the two numbers are not interchangeable. A standard quoted at 98 per cent by area can be materially lower by mass once residual solvent and water are counted, which changes the weight a laboratory has to weigh. 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) - UMECLIDINIUM ELLIPTA (UMECLIDINIUM) AEROSOL, POWDER [PRASCO LABORATORIES].

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

In this group: 1 fine chemical · 1 impurity reference standard. CAS numbers are listed for 2 of 2; 2 entries carry a structure drawing.

On this page

2 reference standards

All entries — structure, identifiers and pack sizes

2 reference standards

Frequently asked

How many Umeclidinium-related reference standards do you hold?
2 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 2 of them and 2 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply an Umeclidinium 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 Umeclidinium 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 Umeclidinium 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.