Cefazolin impurities and related standards
19 reference standards related to Cefazolin held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.
CAS numbers are listed for 19 of 19; 17 entries carry a structure drawing.
| Compound | CAS No. | Catalogue No. | Formula | MW |
|---|---|---|---|---|
| Cefazolin EP Impurity G | 1172998-53-6 | RS-C103001 | C11H10N6O4S | 322.3 |
| Cefazolin Impurity C | 1476-46-6 | RS-C103002 | C14H19N3O7S | 373.38 |
| Cefazolin Impurity 11 | 15690-38-7 | RS-C103003 | C8H10N2O4S | 230.24 |
| Cefazolin USP Impurity B | 1675245-47-2 | RS-C103005 | C5H9N5O3 | 187.16 |
| Cefazolin Impurity 12 | 184696-69-3 | RS-C103007 | C8H8N2O3S | 212.23 |
| Cefazolin Impurity 10 | 18884-65-6 | RS-C103008 | C10H12N2O5S | 272.28 |
| Cefazolin USP Impurity L-δ2 | 2247245-33-4 | RS-C103009 | C14H16N8O5S3 | 472.52 |
| Cefazolin EP Impurity K (Cefazolinamide) | 2410652-70-7 | RS-C103011 | C14H15N9O3S3 | 453.5 |
| Cefazolin Impurity 4 | 2416213-67-5 | RS-C103012 | C18H20N4O8S2 | 484.5 |
| Cefazolin Impurity 3 | 2429-86-9 | RS-C103013 | C14H17N3O6S.HCl | 355.37 |
| Cefazolin Impurity 19 | 26395-99-3 | RS-C103014 | C8H10N2O3S | 214.24 |
| Cefazolin Impurity EP-E | 29490-19-5 | RS-C103015 | C3H4N2S2 | 132.21 |
| Cefazolin Impurity EP-A | 30246-33-4 | RS-C103016 | C11H12N4O3S3 | 344.43 |
| Cefazolin Impurity 34 | 66338-95-2 | RS-C103018 | C6H8ClNO4 | 193.59 |
| Cefazolin Impurity EP-H | 957-68-6 | RS-C103019 | C10H12N2O5S | 272.28 |
| Cefazolin USP Impurity B Precursor | 1809086-26-7 | RS-C103006 | C7H13N5O3 | 215.21 |
| Cefazolin Impurity B (EP) | 2384108-14-7 | RS-C103010 | C16H20N4O4S3 | 428.54 |
| Cefazolin Impurity EP-J | 1675245-00-7 | RS-C103004 | C11H12N6O5S | 340.32 |
| Cefazolin Impurity 35 | 65041-65-8 | RS-C103017 | C5H6N2OS2 | 174.24 |
Structures
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Cefazolin EP Impurity G
COA per lot -
Cefazolin Impurity C
COA per lot -
Cefazolin Impurity 11
COA per lot -
Cefazolin USP Impurity B
COA per lot -
Cefazolin Impurity 12
COA per lot -
Cefazolin Impurity 10
COA per lot -
Cefazolin USP Impurity L-δ2
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Cefazolin EP Impurity K (Cefazolinamide)
COA per lot
Frequently asked
How many Cefazolin-related reference standards do you hold?
19 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 19 of them and 17 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Cefazolin 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 Cefazolin 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 Cefazolin 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.