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Febuxostat impurities and related standards

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

CAS numbers are listed for 31 of 31; 31 entries carry a structure drawing.

Febuxostat — related standards
CompoundCAS No.Catalogue No.FormulaMW
Febuxostat Impurity 63 138330-01-5 RS-F029015 C10H9NOS 191.25
Febuxostat Impurity 52 161718-85-0 RS-F029020 C12H14N2O2 218.26
Febuxostat Impurity 79 1886961-39-2 RS-F029025 C14H12N2O3S 288.32
Febuxostat Impurity 64 2227293-68-5 RS-F029027 C11H9NO2S 219.26
Febuxostat Impurity 71 2428631-67-6 RS-F029029 C19H19N3O3S 369.44
Febuxostat Impurity 44 2476465-11-7 RS-F029031 C18H21NO5S 363.43
Febuxostat Impurity 46 118485-48-6 RS-F029001 C13H13NO3S 263.31
Febuxostat Impurity 5 1206550-99-3 RS-F029002 C15H17NO3S 291.09
Febuxostat Impurity 1 1239233-86-3 RS-F029003 C16H18N2O4S 334.39
Febuxostat Impurity 2 1239233-87-4 RS-F029004 C16H17NO5S 335.08
Febuxostat Impurity 6 1271738-74-9 RS-F029005 C18H22N2O4S 362.44
Febuxostat Impurity 51 1312815-35-2 RS-F029006 C12H9NO4S 263.27
Febuxostat Impurity 103 1312815-36-3 RS-F029007 C20H25NO4S 375.48
Febuxostat Impurity 13 1330632-46-6 RS-F029008 C12H16N2OS2 268.07
Febuxostat Impurity 19 1330632-47-7 RS-F029009 C22H24N2O5S2 460.57
Febuxostat Impurity 20 1330632-48-8 RS-F029010 C20H20N2O5S2 432.51
Febuxostat Impurity 10 1335202-59-9 RS-F029011 C16H16N2O3S 316.37
Febuxostat Impurity 15 1335202-60-2 RS-F029012 C15H16N2OS 272.37
Febuxostat Impurity 106 1346238-15-0 RS-F029013 C18H22N2O4S 362.44
Febuxostat Impurity 105 1380049-42-2 RS-F029014 C18H22N2O3S 346.44
Febuxostat Impurity 11 144060-52-6 RS-F029016 C15H14N2O3S 302.07
Febuxostat Impurity 68 144060-62-8 RS-F029017 C16H17NO4S 319.38
Febuxostat Impurity 6 144060-97-9 RS-F029018 C17H21NO3S 319.12
Febuxostat Impurity 7 160844-75-7 RS-F029019 C18H20N2O3S 344.43
Febuxostat Impurity 5 161798-02-3 RS-F029021 C14H12N2O3S 288.32
Febuxostat Impurity 59 161798-03-4 RS-F029022 C18H21NO4S 347.43
Febuxostat Impurity 72 163597-57-7 RS-F029023 C12H14N2OS 234.32
Febuxostat Impurity 9 1657014-33-9 RS-F029024 C16H16N2O3S 316.09
Febuxostat Impurity 25 2095166-41-7 RS-F029026 C18H21NO5S 363.43
Febuxostat Impurity 80 2375033-26-2 RS-F029028 C19H21NO5S 375.44
Febuxostat Impurity 23 2476465-06-0 RS-F029030 C17H19NO5S 349.4

Structures

Frequently asked

How many Febuxostat-related reference standards do you hold?
31 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 31 of them and 31 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Febuxostat 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 Febuxostat 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 Febuxostat 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 [email protected].