Levofloxacin Impurity 32 CAS 1329833-82-0
| CAS No. | 1329833-82-0 |
| Molecular Formula | C23H31N5O4 |
| Molecular Weight | 441.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Levofloxacin Impurity 32 (CAS 1329833-82-0, C23H31N5O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Levofloxacin Impurity 32 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 441.52 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C23H31N5O4 |
| Molecular Weight | 441.52 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 5 |
Related Levofloxacin Standards
- Levofloxacin Impurity 58 (CAS CATO-C4X-137158)
- Levofloxacin impurity 65 (CAS CATO-C4X-137165)
- Levofloxacin Impurity 19 (CAS 2206135-16-0)
- Levofloxacin Impurity 42 (CAS 1330277-19-4)
- Levofloxacin Impurity 34 (CAS CATO-C4X-137134)
- Levofloxacin Impurity 36 (CAS 2130840-88-7)
- Levofloxacin Impurity 41 (CAS CATO-C4X-137141)
- Levofloxacin Impurity 99 (CAS 902172-11-6)
Recommended Standards
- Cefditoren Impurity 53 (CAS CATO-C4X-135853)
- Cefditoren Impurity 27 (CAS CATO-C4X-135827)
- Vilazodone (CAS 163521-12-8)
- Lacidipine BP Impurity A (CAS 103890-81-9)
- Eperisone impurity 10 (CAS CATO-C4X-227910)
- Biotin iimpurity 26 (CAS CATO-C4X-156326)
- Tolvaptan Impurity 51 (CAS CATO-C4X-195551)
- 4-(2-Aminoethyl)oxepan-4-ol (CAS 1506637-88-2)
- 4-Formyl-N-[4-methyl-3-[(4-(3-pyridinyl)-2-pyrimidinyl)amino]phenyl]benzamide (CAS 1219828-35-9)
- 2-Methyl-1H-indole-6-carbonitrile (CAS 18871-10-8)
- 4-Chloro-2-(trifluoromethyl)benzoyl Chloride (CAS 98187-13-4)
- Flamprop-M-Isopropyl (CAS 63782-90-1)
- 1-(3,4-Difluorophenyl)ethanamine (CAS 276875-21-9)
- Liraglutide-d8 Tritrifluoroacetate (CAS CATO-C4X-199223)
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