Salbutamol impurity 91 CAS CATO-C4X-1176191
| CAS No. | CATO-C4X-1176191 |
| Molecular Formula | C13H18N2O4 |
| Molecular Weight | 266.29 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Salbutamol impurity 91 (CAS CATO-C4X-1176191), a pharmacopoeial impurity reference standard (molecular formula C13H18N2O4, MW 266.29 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Salbutamol impurity 91 (C13H18N2O4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C13H18N2O4 |
| Molecular Weight | 266.29 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Salbutamol Standards
- Salbutamol Impurity 104 (CAS 27566-09-2)
- Salbutamol Impurity 202 (CAS CATO-C4X-1176202)
- Salbutamol Impurity 21 (CAS 2387728-91-6)
- Salbutamol Impurity 63 (CAS CATO-C4X-117663)
- Salbutamol Impurity 9 (CAS 754926-25-5)
- Salbutamol Impurity 81 (CAS CATO-C4X-1176181)
- Salbutamol impurity 166 (CAS 2919946-71-5)
- Salbutamol Impurity 156 (CAS CATO-C4X-1176156)
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Why CATO?
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