Lornoxicam Impurity 31 CAS CATO-C4X-201631
| CAS No. | CATO-C4X-201631 |
| Molecular Formula | C7H6ClNO3S2 |
| Molecular Weight | 251.71 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 251.71 g/mol gives Lornoxicam Impurity 31 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Lornoxicam Impurity 31 (CAS CATO-C4X-201631) is a certified pharmaceutical impurity reference standard with the molecular formula C7H6ClNO3S2 and a molecular weight of 251.71 g/mol.
Based on its molecular formula C7H6ClNO3S2, Lornoxicam Impurity 31 contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 251.71 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C7H6ClNO3S2 |
| Molecular Weight | 251.71 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Lornoxicam Standards
- Lornoxicam Impurity 43 (CAS CATO-C4X-201643)
- Lornoxicam impurity 69 (CAS CATO-C4X-201669)
- Lornoxicam Impurity 102 (CAS CATO-C4X-2016102)
- Lornoxicam Impurity 33 (CAS 941239-79-8)
- Lornoxicam Impurity 6 (CAS 70374-36-6)
- Lornoxicam Impurity 44 (CAS 1030422-51-5)
- Lornoxicam impurity 66 (CAS CATO-C4X-201666)
- Lornoxicam Impurity 74 (CAS CATO-C4X-201674)
Recommended Standards
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- Esomeprazole Impurity 81 (CAS CATO-C4X-111281)
- Sorbitol Impurity 5 (CAS CATO-C4X-25325)
- Ethyl (E)-nona-2,8-dienoate (CAS 852820-73-6)
- Elobixibat Impurity 25 (CAS CATO-C4X-283825)
- N2-(furan-2-ylmethyl)pyridine-2,3-diamine (CAS 90518-36-8)
- 2-(2,3-Dihydro-1H-inden-5-yloxy)propanoyl chloride (CAS 1160257-34-0)
- Ethyl 3-benzyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (CAS 92192-35-3)
- 2-((Pentan-3-ylamino)methyl)phenol (CAS 1019482-81-5)
- Tau Peptide (74-102) (Exon 3/Insert 2 Domain) trifluoroacetate salt (CAS 1322695-34-0)
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