Enrofloxacin Impurity 7 CAS 93107-31-4
| CAS No. | 93107-31-4 |
| Molecular Formula | C13H9Cl2NO3 |
| Molecular Weight | 298.12 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Enrofloxacin Impurity 7 (CAS 93107-31-4) is a certified pharmaceutical impurity reference standard with the molecular formula C13H9Cl2NO3 and a molecular weight of 298.12 g/mol.
Based on its molecular formula C13H9Cl2NO3, Enrofloxacin Impurity 7 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 298.12 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C13H9Cl2NO3 |
| Molecular Weight | 298.12 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
| CAS Registry Year (est.) | 1983 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Enrofloxacin Standards
- Enrofloxacin Impurity 13 (CAS 2388490-12-6)
- Enrofloxacin Impurity 11 (CAS 160312-26-5)
- Enrofloxacin EP Impurity F (CAS 131775-99-0)
- Enrofloxacin Impurity 8 (CAS CATO-C4X-16288)
- Enrofloxacin Impurity 12 (CAS 130579-27-0)
- Enrofloxacin EP Impurity C (CAS 138892-82-7)
- Enrofloxacin - Impurity C (Hydrochloride Salt) (CAS 2732310-93-7)
- Enrofloxacin Impurity 10 (CAS CATO-C4X-162810)
Recommended Standards
- N-(3,4-Dichlorobenzyl)-3-nitropyridin-2-amine (CAS 866154-67-8)
- 1-(2-Bromo-4-methylphenyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 1016750-76-7)
- Methyl 4-iodo-1-methoxycyclohexane-1-carboxylate (CAS 2097133-18-9)
- 1-(4-Bromo-2-methylphenyl)-2-oxopyrrolidine-3-carboxylic acid (CAS 1017417-32-1)
- Brivaracetam Impurity 118 (CAS CATO-C4X-2007118)
- Esomeprazole Impurity 23 (CAS 1422063-97-5)
- Atenolol Impurity 20 (CAS CATO-C4X-154920)
- 1-(4-fluorophenyl)-2-(methylthio)-1H-imidazole-5-carboxylic acid (CAS 750598-95-9)
- 3-Cyclopropylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid (CAS 1779124-35-4)
- 5,7-Dichloro-4-fluoro-1H-indole-3-carboxylic acid (CAS 948581-70-2)
- (R)-Benzyl (1-hydroxy-4-(methylamino)-4-oxobutan-2-yl)carbamate (CAS 1012059-95-8)
- (2-Methyl-2-azabicyclo[2.2.2]octan-1-yl)methanol (CAS 1108615-69-5)
- Ethyl (R)-3-methylpiperazine-1-carboxylate (CAS 657424-03-8)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788677)
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