Lornoxicam Impurity 73 CAS CATO-C4X-201673
| CAS No. | CATO-C4X-201673 |
| Molecular Formula | C7H5N2O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Lornoxicam Impurity 73 (CAS CATO-C4X-201673), a pharmacopoeial impurity reference standard (molecular formula C7H5N2O3K, MW 204.23 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Lornoxicam Impurity 73 (C7H5N2O3K) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.5, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 204.23 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H5N2O3 K |
| Molecular Weight | 204.23 g/mol |
| Appearance | Off-white to pale 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, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Lornoxicam Standards
- Lornoxicam Impurity N1 (CAS 1017791-22-8)
- Lornoxicam Impurity 44 (CAS 1030422-51-5)
- Lornoxicam Impurity 4 (CAS 106820-59-1)
- Lornoxicam Impurity 37 (CAS 106820-63-7)
- Lornoxicam impurity 50 (CAS 1076197-25-5)
- Lornoxicam impurity 57 (CAS 1212061-59-0)
- Lornoxicam-D4 (CAS 1216527-48-8)
- Lornoxicam impurity 60 (CAS 123252-96-0)
Recommended Standards
- Ziprasidone EP Impurity D HCl (CAS 1303996-68-0（free base）)
- N-Nitroso Oxacillin Impurity 62 (CAS CATO-C4X-232162)
- Fulvestrant impurity 46 (CAS CATO-C4X-191746)
- (1R,3S)-Methyl 3-methylcyclopentanecarboxylate (CAS 126110-36-9)
- 7-(Benzyloxy)heptanal (CAS 129649-05-4)
- 3-(4-Aminophenyl)-3-methylbutanoic acid (CAS 42288-10-8)
- 5-Amino-2-chloro-4-methoxypyrimidine (CAS 96833-41-9)
- (R)-tert-Butyl (2-amino-1-phenylethyl)carbamate (CAS 137102-65-9)
- N-(1-Acetylindolin-6-yl)-4-phenylbutanamide (CAS 1021209-80-2)
- Pancreatic Polypeptide (rat) (CAS 90419-12-8)
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