Lornoxicam impurity 91 CAS 1629361-76-7
| CAS No. | 1629361-76-7 |
| Molecular Formula | C7H7ClO5S2 |
| Molecular Weight | 270.71 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Lornoxicam impurity 91 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 270.71 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a process- or degradation-related impurity, Lornoxicam impurity 91 (CAS 1629361-76-7, C7H7ClO5S2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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 | C7H7ClO5S2 |
| Molecular Weight | 270.71 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Lornoxicam Standards
- Lornoxicam Impurity 45 (CAS CATO-C4X-201645)
- Lornoxicam impurity 65 (CAS CATO-C4X-201665)
- Lornoxicam Impurity 16 (CAS 70374-37-7)
- Lornoxicam impurity 95 (CAS CATO-C4X-201695)
- Lornoxicam Impurity 25 (CAS CATO-C4X-201625)
- Lornoxicam impurity 48 (CAS 126910-68-7)
- Lornoxicam Impurity 96 (CAS CATO-C4X-201696)
- Lornoxicam impurity 92 (CAS 1629337-69-4)
Recommended Standards
- Amodiaquine Impurity 15 (CAS 81099-86-7)
- Clofenamide (CAS 671-95-4)
- Paliperidone Impurity 68 (CAS CATO-C4X-172468)
- Ethyl 4-(6-chloropyridazin-3-yl)piperazine-1-carboxylate (CAS 100224-52-0)
- Brexpiprazole Impurity 159 (CAS CATO-C4X-1131159)
- Trimebutine Impurity 22 (CAS CATO-C4X-185822)
- Sofosbuvir Impurity 28 (CAS CATO-C4X-105228)
- 2-Bromo-8-hydroxypyrido[3,2-d]pyrimidine-7-carboxylic acid (CAS 1098588-17-0)
- 3-methyl-1,2,3,4-tetrahydroisoquinolin-5-amine (CAS 1391086-45-5)
- 2-(5-Chloropyridin-2-yl)-5-methyl-2H-1,2,3-triazole-4-carboxylic acid (CAS 1431728-82-3)
- cis-4-(Cyclohexylamino)tetrahydrofuran-3-ol (CAS 1178026-71-5)
- (4-Methylcyclohexyl)methanesulfonamide (CAS 919354-63-5)
- 2-aminoindolizine-1-carbonitrile (CAS 63014-89-1)
- Semaglutide Impurity 12 (CAS CATO-C4X-222612)
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