Active ingredientCefoxitin SodiumCat. No. P-C093-002CAS 33564-30-6
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Active ingredient · Cefoxitin family
Pharmaceutical analytical standardCefoxitin
Synonyms: Cephoxitin, Rephoxitin, Mefoxitin, Cenomycin, Ceftoxitin, Mefoxin, Cefoxotin
- Cat. No.
- P-C093-001
- CAS
- 35607-66-0
- Alternative CAS
- 33564-30-6 (sodium salt)
- 73356-24-8 (alternative CAS, same compound)
- Formula
- C16H17N3O7S2
- Molecular weight
- 427.45 g/mol
- Category
- Active ingredient (API)
A beta-lactam antibiotic of the cephamycin family, obtained in the 1970s by semi-synthesis from cephamycin C, a natural antibiotic of bacterial origin: given intravenously, it resists many beta-lactamases thanks to a 7-alpha methoxy group.
Did you know?In microbiology labs the cefoxitin disc is used to detect methicillin-resistant staphylococci (MRSA): in the United States it has replaced methicillin itself, which is no longer available.
The two levels compared
| Level 1 Mass balance | Level 2 Mass balance + qNMR | |
|---|---|---|
| Identity (IR, MS, 1H and 13C-NMR; peptides: ESI-MS, MALDI-TOF and IR) | ✓ | ✓ |
| HPLC purity (min. 95%) | ✓ | ✓ |
| Content by mass balance (min. 90%; peptides: for information only)* | ✓ | ✓ |
| Content verified by qNMR (small molecules only) | · | ✓ |
| Suitable to qualify it as an in-house primary standard (ICH Q7) | · | ✓ |
* Mass balance is performed on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it, for example oils and highly volatile substances, on which some of the required measurements cannot be made: in those cases the CoA states how the content was assigned.
What you receive
The analytical standard
Shipped under controlled temperature when the molecule requires it.
Certificate of analysis (CoA)
For every lot: identity, purity and assay, with the supporting spectra and chromatograms.
Safety data sheet (SDS)
Sent with every order.
Tracked shipment
Follow your shipment live, from our warehouse to your lab.
Pharmacopoeial standards available
The official European Pharmacopoeia standards for this molecule, supplied with EDQM documentation.
- Cefoxitin for peak identification A CRSEP Y0002383
More products in the Cefoxitin family
Active ingredientCefoxitin SodiumCat. No. P-C093-002CAS 33564-30-6
Pharmacopoeial impurityCefoxitin EP Impurity ACat. No. P-C093-003CAS 54333-94-7
Pharmacopoeial impurityCefoxitin EP Impurity BCat. No. P-C093-004CAS 1422023-32-2
Pharmacopoeial impurityCefoxitin EP Impurity CCat. No. P-C093-005CAS 10590-10-0
Pharmacopoeial impurityCefoxitin EP Impurity DCat. No. P-C093-006CAS 1422023-33-3
Pharmacopoeial impurityCefoxitin EP Impurity ECat. No. P-C093-007CAS 2395025-32-6
Pharmacopoeial impurityCefoxitin EP Impurity FCat. No. P-C093-008CAS 2395025-37-1
Pharmacopoeial impurityCefoxitin EP Impurity GCat. No. P-C093-009Frequently asked questions
Is mass balance always performed?
Yes, on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it: for example oils and highly volatile substances, on which some measurements (such as thermogravimetry) cannot be made. In those cases the CoA states which method was used to assign the content.
Can I ask for a different quantity?
Yes. The quantities are only suggestions: choose "Other" and enter the milligrams or grams you need.
Which level should I choose?
Level 1 is enough for most routine testing. Level 2 adds an independent qNMR content value and is meant for labs that need to qualify an in-house primary standard. For peptides and similar molecules, Level 2 is not available.
When will I get the quote?
Within 24 working hours, with price, availability and delivery time.
Need a molecule you cannot find?
Custom synthesis of impurities, metabolites and labelled compounds, with the same characterisation level.