Meloxicam Impurity 7 CAS 632-25-7
| CAS No. | 632-25-7 |
| Molecular Formula | C7H6O5S |
| Molecular Weight | 202.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Meloxicam Impurity 7 is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Meloxicam Impurity 7 (CAS 632-25-7) is a certified pharmaceutical impurity reference standard with the molecular formula C7H6O5S and a molecular weight of 202.18 g/mol.
Structurally, Meloxicam Impurity 7 (C7H6O5S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 202.18 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Meloxicam Impurity 7 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 | C7H6O5S |
| Molecular Weight | 202.18 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Meloxicam Standards
- Meloxicam impurity 13 (CAS CATO-C4X-169013)
- Meloxicam Impurity 12 (CAS 5510-10-1)
- Meloxicam Impurity 8 (CAS 125372-22-7)
- Meloxicam Impurity 16 (CAS 39122-64-0)
- Meloxicam Impurity 10 (CAS CATO-C4X-169010)
- Meloxicam Impurity 9 (CAS 13165-80-5)
- Meloxicam Impurity 11 (CAS 1865298-74-3)
- Meloxicam Impurity 17 (CAS CATO-C4X-169017)
Recommended Standards
- Ixazomib Impurity 68 (CAS 121-53-9)
- Arotinolol Impurity 48 (CAS CATO-C4X-185448)
- Tedizolid Impurity 70 (CAS 2563929-79-1)
- Probenecid EP Impurity A (CAS 636-78-2)
- Penehyclidine impurity 12 (CAS 151673-91-5)
- Ruxolitinib Impurity 20 (CAS CATO-C4X-205820)
- Trifarotene Impurity 13 (CAS CATO-C4X-313213)
- 5-(4-Methoxyphenyl)-4,5-dihydro-1,2-oxazole-3-carboxylic acid (CAS 1018051-51-8)
- (3AR,4R,5R,6aS)-4-((E)-4-(3-Chlorophenoxy)-3-oxobut-1-en-1-yl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl benzoate (CAS 178454-81-4)
- Bupropion Impurity 13 (CAS 92821-92-6)
- 2-Methoxypyridine-3,5-diamine (CAS 137066-64-9)
- (S)-4-methyl-3-(pyrrolidin-2-yl)benzoic acid (CAS 1213371-26-6)
- Diethyl 2-benzyl-2-methylmalonate (CAS 55114-30-2)
- Tirzepatide Impurity 9 (CAS CATO-C4X-32409)
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