Cefixime EP Impurity C CAS 108691-83-4
| CAS No. | 108691-83-4 |
| Molecular Formula | C16H15N5O7S2 |
| Molecular Weight | 453.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Cefixime EP Impurity C.
CATO supplies Cefixime EP Impurity C (CAS 108691-83-4), a pharmacopoeial impurity reference standard (molecular formula C16H15N5O7S2, MW 453.45 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Cefixime EP Impurity C (C16H15N5O7S2) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Cefixime EP Impurity C under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C16H15N5O7S2 |
| Molecular Weight | 453.45 g/mol |
| Purity | >90% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefixime Standards
- Cefixime (CAS 79350-37-1)
- Cefixime Impurity 14 (CAS CATO-C4X-113914)
- Cefixime Impurity 15 (CAS CATO-C4X-113915)
- Cefixime Impurity 54 (CAS CATO-C4X-113954)
- Cefixime EP Impurity D (CAS 97164-56-2)
- Cefixime Impurity 27 (CAS 29126-11-2)
- Cefixime Impurity 41 (CAS CATO-C4X-113941)
- Cefixime Impurity 42 (CAS CATO-C4X-113942)
Recommended Standards
- Aztreonam Impurity 42 (CAS CATO-C4X-152242)
- K252b (CAS 99570-78-2)
- Aztreonam impurity 56 (CAS CATO-C4X-152256)
- 5-Ethyl-3-hydroxy-2-(((2-(naphthalen-1-yloxy)-5-(trifluoromethyl)phenyl)imino)methyl)cyclohex-2-en-1-one (CAS 1024259-71-9)
- Carfilzomib Impurity 25 (CAS CATO-C4X-102225)
- Ticagrelor Impurity 79 (CAS CATO-C4X-109379)
- Testosterone Impurity 26 (CAS CATO-C4X-243226)
- 3-fluoro-1-N-(propan-2-yl)benzene-1,2-diamine (CAS 1033010-33-1)
- 5-Chloro-2-fluoro-4-iodoaniline (CAS 1935087-03-8)
- 1-Piperidin-4-yl-pyrrolidin-2-one (CAS 91596-61-1)
- 5-Bromo-2-chloro-3-hydroxybenzoic acid (CAS 697762-68-8)
- 6-(Benzofuran-2-yl)-2-(pyridin-4-yl)-4H-chromen-4-one (CAS 652138-06-2)
- (E)-3-(1-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-1H-indol-3-yl)acrylic acid (CAS 1164457-90-2)
- Neuropeptide Y (free acid) (human, rat) trifluoroacetate salt (CAS 99575-89-0)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com