Arotinolol impurity 25 CAS 96991-65-0
| CAS No. | 96991-65-0 |
| Molecular Formula | C7H5BrO3S |
| Molecular Weight | 249.08 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Arotinolol impurity 25 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.
CATO supplies Arotinolol impurity 25 (CAS 96991-65-0), a pharmacopoeial impurity reference standard (molecular formula C7H5BrO3S, MW 249.08 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, Arotinolol impurity 25 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 249.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C7H5BrO3S |
| Molecular Weight | 249.08 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Arotinolol Standards
- Arotinolol Impurity 11 (CAS 68257-90-9)
- Arotinolol impurity 26 (CAS 96991-51-4)
- Arotinolol Impurity 67 (CAS CATO-C4X-185467)
- Arotinolol Impurity 10 (CAS CATO-C4X-185410)
- Arotinolol intermediate product 8 (CAS 52560-89-1)
- Arotinolol Impurity 36 (CAS 52561-15-6)
- Arotinolol Impurity 76 (CAS CATO-C4X-185476)
- Arotinolol Impurity 42 (CAS 57797-77-0)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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