Levodopa Impurity 14 CAS 161940-76-7
| CAS No. | 161940-76-7 |
| Molecular Formula | C9H5NO4 |
| Molecular Weight | 191.14 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Levodopa Impurity 14 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Levodopa Impurity 14 (CAS 161940-76-7) is a certified pharmaceutical impurity reference standard with the molecular formula C9H5NO4 and a molecular weight of 191.14 g/mol.
Based on its molecular formula C9H5NO4, Levodopa Impurity 14 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 191.14 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), Levodopa Impurity 14 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H5NO4 |
| Molecular Weight | 191.14 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2003 |
| Nitrogen Atoms | 1 |
Related Levodopa Standards
Recommended Standards
- 2,3-DIOXOINDOLINE-5-CARBOXYLIC ACID (CAS 25128-32-9)
- Isosorbide Dinitrate, Diluted EP Impurity C (CAS 16051-77-7)
- 1-Nitroso-1H-indazole-3-carboxylic Acid (CAS CATO-C3D-26200)
- L-Isoidide Mononitrate (Diluted with Lactose) (CAS 16908-91-1)
- Tirofiban Impurity 11 (CAS 2250243-43-5)
- Apremilast Impurity 3 (CAS 1802246-60-1)
- Ibuprofen Impurity 94 (CAS CATO-C4X-108294)
- (3-Bromo-4-chlorophenyl)hydrazine hydrochloride (CAS 1172589-41-1)
- 3-(Pyridin-3-yl)isoxazole-5-carboxylic acid (CAS 901926-72-5)
- 4-amino-N-(3-morpholin-4-ylpropyl)benzamide (CAS 293738-01-9)
- 1-Benzyl-4-(6-bromopyridin-3-yl)piperazine (CAS 1707358-08-4)
- Bilastine impurity 112 (CAS CATO-C4X-2253112)
- 7-[2-(2-methylthiazol-4-yl)ethynyl]-1,2-benzoxazol-3-amine (CAS 2498757-48-3)
- Galanin-Like Peptide (rat) trifluoroacetate salt (CAS 245114-97-0)
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