Betamethasone impurities and related standards
18 reference standards related to Betamethasone held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.
In this group: 16 impurity reference standards · 2 fine chemicals. CAS numbers are listed for 18 of 18; 18 entries carry a structure drawing.
| Compound | CAS No. | Catalogue No. | Formula | MW |
|---|---|---|---|---|
| Betamethasone Impurity 55 | 1203841-43-3 | RS-B054003 | C21H27FO4 | 362.44 |
| Betamethasone EP Impurity C | 13504-15-9 | RS-B054005 | C22H28O4 | 356.46 |
| Betamethasone EP Impurity J | 18383-24-9 | RS-B054008 | C22H30O4 | 358.47 |
| Betamethasone EP Impurity I | 185613-69-8 | RS-B054009 | C22H29FO5 | 392.46 |
| Betamethasone EP Impurity H | 185613-71-2 | RS-B054010 | C22H29FO5 | 392.46 |
| Betamethasone EP Impurity B | 25122-41-2 | RS-B054012 | C22H28ClFO4 | 410.91 |
| Betamethasone EP Impurity F | 330157-04-5 | RS-B054013 | C22H28O4 | 356.46 |
| Betamethasone EP Impurity D | 52619-05-3 | RS-B054014 | C25H33FO7 | 464.52 |
| Betamethasone EP Impurity C | 75883-07-7 | RS-B054017 | C25H33FO6 | 448.52 |
| Betamethasone EP Impurity G | 85700-75-0 | RS-B054018 | C22H30O5 | 374.47 |
| Betamethasone Impurity 47 | 1150311-95-7 | RS-B054001 | C22H29FO5 | 392.46 |
| (17RS)-Betamethasone 20-hydroxy 21-acid impurity | 1155886-49-9 | RS-B054002 | C22H29FO5 | 392.5 |
| Betamethasone Impurity 42 | 1549-35-5 | RS-B054007 | C24H33FO6 | 436.51 |
| 11,12-Dehydroxy-Betamethasone | 127034-59-7 | RS-B054004 | C22H27FO4 | 374.45 |
| 1,2-Dihydro Betamethasone 17-Valerate | 154713-07-2 | RS-B054006 | C27H39FO6 | 478.59 |
| 11-Ketobetamethasone | 2282-51-1 | RS-B054011 | C22H27FO5 | 390.45 |
| 1,2-Dihydro-Betamethasone | 560-34-9 | RS-B054015 | C22H31FO5 | 394.5 |
| 21-Dehydro Betamethasone | 61558-12-1 | RS-B054016 | C22H27FO5 | 390.45 |
Structures
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Betamethasone Impurity 55
COA per lot -
Betamethasone EP Impurity C
COA per lot -
Betamethasone EP Impurity J
COA per lot -
Betamethasone EP Impurity I
COA per lot -
Betamethasone EP Impurity H
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Betamethasone EP Impurity B
COA per lot -
Betamethasone EP Impurity F
COA per lot -
Betamethasone EP Impurity D
COA per lot
Frequently asked
How many Betamethasone-related reference standards do you hold?
18 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 18 of them and 18 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Betamethasone 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 Betamethasone 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 Betamethasone 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.