Salbutamol Impurity 137 CAS CATO-C4X-1176137
| CAS No. | CATO-C4X-1176137 |
| Molecular Formula | C20H27NO4 |
| Molecular Weight | 345.43 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 137.
As a process- or degradation-related impurity, Salbutamol Impurity 137 (CAS CATO-C4X-1176137, C20H27NO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Salbutamol Impurity 137 (C20H27NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C20H27NO4 |
| Molecular Weight | 345.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Salbutamol Standards
- Salbutamol Impurity 135 (CAS CATO-C4X-1176135)
- Salbutamol Impurity 136 (CAS CATO-C4X-1176136)
- Salbutamol Impurity 24 (CAS CATO-C4X-117624)
- Salbutamol Impurity 88 (CAS 156339-89-8)
- Salbutamol Impurity 57 (CAS CATO-C4X-1176157)
- Salbutamol Impurity 120 (CAS CATO-C4X-1176120)
- Salbutamol Impurity 128 (CAS CATO-C4X-1176128)
- Salbutamol Impurity 101 (CAS CATO-C4X-1176101)
Recommended Standards
- Levetiracetam Impurity 43 (CAS CATO-C4X-106743)
- Bisoprolol Impurity 76 (CAS CATO-C4X-124776)
- tert-butyl N-tert-butoxycarbonyl-N-[2-(1-hydroxyethyl)pyrimidin-4-yl]carbamate (CAS 2387594-88-7)
- Dobutamine Impurity 56 (CAS CATO-C4X-129856)
- Ulipristal Impurity 25 (CAS CATO-C4X-191525)
- Ticagrelor Impurity 67 (CAS CATO-C4X-109367)
- Maxacalcitol Impurity 21 (CAS 192573-36-7)
- 1-(6-Methoxy-5-methylnaphthalen-2-yl)ethan-1-one (CAS 107774-41-4)
- 2-Amino-1-(1-methyl-1h-pyrazol-4-yl)ethan-1-ol (CAS 1152927-77-9)
- 2-(3,5-Dimethyl-1-{[1,2,3,4]tetrazolo[1,5-a]pyrazin-5-yl}-1h-pyrazol-4-yl)acetic acid (CAS 1291943-51-5)
- 4-Amino-1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)-5-vinyltetrahydrofuran-2-yl)pyrimidin-2(1H)-one (CAS 847651-93-8)
- (R)-Methyl 4-((3R,5R,8R,9S,10S,13R,14S,17R)-3-acetoxy-10,13-dimethyl-12-oxohexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate (CAS 5143-55-5)
- Ethyl ((4,5-diphenyloxazol-2-yl)methyl)(methyl)carbamate (CAS 33161-68-1)
- Semaglutide impurity 24 (CAS CATO-C4X-222624)
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