Salbutamol Impurity S91 CAS CATO-C4X-117691
| CAS No. | CATO-C4X-117691 |
| Molecular Formula | C13H19NO3 |
| Molecular Weight | 237.29 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Salbutamol Impurity S91.
Salbutamol Impurity S91 (CAS CATO-C4X-117691) is a certified pharmaceutical impurity reference standard with the molecular formula C13H19NO3 and a molecular weight of 237.29 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Salbutamol Impurity S91 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 237.29 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C13H19NO3 |
| Molecular Weight | 237.29 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Salbutamol Standards
- Salbutamol Impurity 67 (CAS CATO-C4X-117667)
- Salbutamol Impurity 207 (CAS CATO-C4X-1176207)
- Salbutamol Impurity 55 (CAS 115787-52-5)
- Salbutamol Impurity 92 (CAS CATO-C4X-117692)
- (S)-Salbutamol (CAS 34271-50-6)
- Salbutamol Impurity 170 (CAS CATO-C4X-1176170)
- Salbutamol Impurity 171 (CAS CATO-C4X-1176171)
- Salbutamol Impurity 203 (CAS CATO-C4X-1176203)
Recommended Standards
- Terbutaline EP impurity B (CAS 94120-05-5)
- Milrinone Impurity 33 (CAS CATO-C4X-109133)
- Terbutaline impound 95 (CAS CATO-C4X-118395)
- 3096-52-4 2-Nitro-9-fluorenone 9H-Fluoren-9-one, 2-nitro- 4-07-00-01636 (Beilstein Handbook Reference) BRN 2052959 CCRIS 2540 NSC 12365 (CAS 3096-52-4)
- Abemaciclib Impurity 134 (CAS CATO-C4X-2937134)
- Deferiprone EP Impurity C (CAS CATO-C4X-30487)
- Ritodrine impurity 6 (CAS CATO-C4X-27436)
- 1-(1,5-Dimethyl-1h-pyrazol-4-yl)-N-((tetrahydrofuran-2-yl)methyl)methanamine (CAS 1183665-45-3)
- Terbutaline impurity 115 (CAS 1217895-73-2)
- 6-Bromo-1-(difluoromethyl)-2,3,4-trifluorobenzene (CAS 1823550-05-5)
- 63667-85-6 1-(2-Chloroprop-2-en-1-yl)-2-methoxybenzene DTXSID40641178 (CAS 63667-85-6)
- 5-Ethyl-3-methylisoxazolo[4,5-b]pyridine (CAS 144265-71-4)
- 2-Bromo-3-fluorobenzenesulfonamide (CAS 2172127-03-4)
- Palmitoyl hexapeptide-6 (CAS 891498-01-4)
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