Flomoxef Impurity 11 CAS CATO-C4X-138211
| CAS No. | CATO-C4X-138211 |
| Molecular Formula | C15H14F2N2O7S |
| Molecular Weight | 404.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Flomoxef Impurity 11 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Flomoxef Impurity 11 (CAS CATO-C4X-138211), a pharmacopoeial impurity reference standard (molecular formula C15H14F2N2O7S, MW 404.34 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Flomoxef Impurity 11 (C15H14F2N2O7S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 404.34 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C15H14F2N2O7S |
| Molecular Weight | 404.34 g/mol |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Flomoxef Standards
- Flomoxef Impurity 50 (CAS CATO-C4X-138250)
- Flomoxef Impurity 24 (CAS CATO-C4X-138224)
- Flomoxef Impurity 4 (CAS 72591-95-8)
- Flomoxef Impurity 45 (CAS CATO-C4X-138245)
- Flomoxef Impurity 67 (CAS CATO-C4X-138267)
- Flomoxef Impurity 7 (CAS 2095697-76-8)
- Flomoxef Impurity 38 (CAS CATO-C4X-138238)
- Flomoxef Impurity 6 (CAS CATO-C4X-13826)
Recommended Standards
- 4-((3-(Ethoxycarbonyl)-7-(trifluoromethyl)quinolin-4-yl)amino)benzoic acid (CAS 793627-43-7)
- Tosufloxacin Impurity 8 (CAS CATO-C4X-19768)
- 2-[(4-Bromophenyl)sulfanyl]-1-(4-methyl-2-phenyl-1,3-thiazol-5-yl)ethan-1-one (CAS 478047-37-9)
- Tosufloxacin (CAS 100490-36-6)
- Ceftazidime Impurity 40 (CAS CATO-C4X-121240)
- Fosfomycin Impurity 57 (CAS CATO-C4X-131657)
- Entacapone Impurity 26 (CAS 672-13-9)
- 3-(Chloromethyl)-1,1-dimethylcyclohexane (CAS 1415991-32-0)
- 2-Bromo-4-(trifluoromethoxy)acetanilide (CAS 131395-29-4)
- 6-amino-2-methyl-thieno[2,3-d]thiazole-5-carboxylic acid (CAS 2278294-25-8)
- 2-(4-Isobutoxyphenyl)-5,5-dimethylmorpholine (CAS 1368510-74-0)
- (2-Chloro-7-methylquinolin-3-yl)methanol (CAS 170848-22-3)
- L-Arginine-7-amido-4-methylcoumarin hydrochloride (CAS 69304-16-1)
- Semaglutide impurity 101 (CAS CATO-C4X-2226101)
Why CATO?
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