Cefprozil Monohydrate EP Impurity G CAS CATO-C4X-149229
| CAS No. | CATO-C4X-149229 |
| Molecular Formula | C18H21N3O6S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefprozil Monohydrate EP Impurity G (C18H21N3O6SHCl) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Cefprozil Monohydrate EP Impurity G (CAS CATO-C4X-149229) is a certified pharmaceutical impurity reference standard with the molecular formula C18H21N3O6SHCl and a molecular weight of 443.90 g/mol.
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.
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 | C18H21N3O6S 2*HCl |
| Molecular Weight | 443.90 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 | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefprozil Standards
- Cefprozil Δ3 Isomer (CAS 1000980-59-5)
- Cefprozil EP Impurity D (CAS 106447-44-3)
- Cefprozil EP Impurity F (CAS 107937-01-9)
- Cefprozil (2S)-Isomer (CAS 110764-35-7)
- Cefprozil (E)-Isomer monohydrate (CAS 111900-24-4)
- Cefprozil (Z)-Isomer monohydrate (CAS 114876-72-1)
- Cefprozil Impurity 46 (CAS 120709-09-3)
- Cefprozil Monohydrate (CAS 121123-17-9)
Recommended Standards
- Lifitegrast Impurity 162 (CAS CATO-C4X-2409162)
- Aztreonam USP RC A (CAS 87500-74-1)
- Cyclophosphamide Impurity 27 HCl (CAS 2387771-95-9（free base）)
- 3,3-Dimethyl-4-oxopentanoic acid (CAS 23461-67-8)
- 3-(Aminomethyl)-2-methoxypyridine (CAS 354824-19-4)
- tert-Butyl ((1r,4r)-4-((3-(pyridin-4-yl)benzyl)amino)cyclohexyl)carbamate (CAS 1060977-97-0)
- 2-(3,4-Difluorophenyl)-1-(4-methoxyphenyl)ethan-1-one (CAS 221179-71-1)
- 6-Methoxy-1,4-dihydro-2,7-naphthyridin-3(2H)-one (CAS 1393555-54-8)
- (S)-tert-Butyl 2-(fluoromethyl)pyrrolidine-1-carboxylate (CAS 460748-84-9)
- Semaglutide Impurity 15 (CAS CATO-C4X-222615)
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