Efavirenz impurities and related standards
10 reference standards related to Efavirenz held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.
In this group: 9 impurity reference standards · 1 pharmaceutical intermediate. CAS numbers are listed for 10 of 10; 6 entries carry a structure drawing.
| Compound | CAS No. | Catalogue No. | Formula | MW |
|---|---|---|---|---|
| Efavirenz Impurity 12 | 2733280-20-9 | RS-E041008 | C19H19ClF3NO5 | 433.8 |
| Efavirenz Impurity 21 | 1189909-96-3 | RS-E041001 | C14H9ClF3NO4 | 347.67 |
| Efavirenz Impurity 1 | 154801-74-8 | RS-E041002 | C14H9ClF3NO2 | 315.67 |
| Efavirenz Impurity 14 | 173676-60-3 | RS-E041003 | C21H19ClF3NO2 | 409.83 |
| Efavirenz Impurity 15 | 174819-21-7 | RS-E041004 | C22H17ClF3NO3 | 435.82 |
| (E)-Dihydro efavirenz | 440124-96-9 | RS-E041010 | C14H11ClF3NO2 | 317.7 |
| Efavirenz Impurity 13(7-Hydroxy Efavirenz) | 252343-24-1 | RS-E041006 | C14H9ClF3NO3 | 331.68 |
| Efavirenz Impurity 15(8,14-Dihydroxy Efavirenz) | 252343-27-4 | RS-E041007 | C14H9ClF3NO4 | 347.67 |
| Efavirenz Impurity 7(Efavirenz IP Impurity G) | 353270-76-5 | RS-E041009 | C15H11ClF3NO2 | 329.7 |
| Efavirenz Impurity 13 (Mixture of Diastereomers) | 209414-26-6 | RS-E041005 | C21H17ClF3NO2 | 407.82 |
Structures
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Efavirenz Impurity 12
COA per lot -
Efavirenz Impurity 21
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Efavirenz Impurity 1
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Efavirenz Impurity 14
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Efavirenz Impurity 15
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(E)-Dihydro efavirenz
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Efavirenz Impurity 13(7-Hydroxy Efavirenz)
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Efavirenz Impurity 15(8,14-Dihydroxy Efavirenz)
COA per lot
Frequently asked
How many Efavirenz-related reference standards do you hold?
10 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 10 of them and 6 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply an Efavirenz 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 Efavirenz 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 Efavirenz 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].