Diltiazem Impurity 23 CAS 119009-50-6
| CAS No. | 119009-50-6 |
| Molecular Formula | C16H17NO4S |
| Molecular Weight | 319.38 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 Diltiazem Impurity 23.
As a process- or degradation-related impurity, Diltiazem Impurity 23 (CAS 119009-50-6, C16H17NO4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Diltiazem Impurity 23 (C16H17NO4S) contains a flavonoid core, an amide group, a sulfone 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C16H17NO4S |
| Molecular Weight | 319.38 g/mol |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Diltiazem Standards
- Diltiazem Impurity N1 (CAS 42399-48-4)
- Diltiazem Impurity N2 (CAS 42399-50-8)
- Diltiazem Impurity 18 (CAS 131613-02-0)
- Diltiazem Impurity 33 (CAS CATO-C4X-136833)
- Diltiazem Impurity 15 (CAS CATO-C4X-136815)
- Diltiazem impurity 29 (CAS 30193-56-7)
- Diltiazem Impurity 32 (CAS CATO-C4X-136832)
- Diltiazem Impurity 7 (CAS CATO-C4X-13687)
Recommended Standards
- Febuxostat Impurity 93 (CAS CATO-C4X-116293)
- Ketotifen Impurity 28 (CAS CATO-C4X-204628)
- Febuxostat Impurity 29 (CAS 144060-62-8)
- N-(2-(4-Fluorophenoxy)ethyl)-3-(phenylthio)propanamide (CAS 1105210-52-3)
- Amlodipine Impurity 151 (CAS CATO-C4X-1095151)
- Abiraterone Impurity 78 (CAS 98449-11-7)
- Efinaconazole Impurity 32 (CAS CATO-C4X-124332)
- (3-(2-(Pyrrolidin-1-yl)ethoxy)phenyl)boronic acid (CAS 1313761-13-5)
- Atrasentan Impurity 91 (CAS 1059043-44-5)
- N-(4-chloro-2-methylphenyl)-N-(methylsulfonyl)glycine (CAS 425625-27-0)
- 4-(Aminomethyl)cyclohexanecarboxylic Acid (cis- and trans- mixture) (CAS 701-54-2)
- N-propylazetidin-3-amine (CAS 1496439-79-2)
- 1-(4-(Isopentyloxy)-3,5-dimethylphenyl)ethan-1-ol (CAS 1443340-52-0)
- Semaglutide impurity 255 (CAS CATO-C4X-2226255)
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