Dicloxacillin Impurity C34 CAS 42947-69-3
| CAS No. | 42947-69-3 |
| Molecular Formula | C19H19Cl2N3O6S |
| Molecular Weight | 488.34 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 Dicloxacillin Impurity C34.
Dicloxacillin Impurity C34 (CAS 42947-69-3) is a certified pharmaceutical impurity reference standard with the molecular formula C19H19Cl2N3O6S and a molecular weight of 488.34 g/mol.
Dicloxacillin Impurity C34 (C19H19Cl2N3O6S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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 | C19H19Cl2N3O6S |
| Molecular Weight | 488.34 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Dicloxacillin Standards
- Dicloxacillin EP Impurity A (CAS CATO-C4X-16151)
- Dicloxacillin Impurity 7 (CAS CATO-C4X-16157)
- Dicloxacillin Impurity 8 (CAS CATO-C4X-16158)
- Dicloxacillin Impurity 4 (CAS CATO-C4X-16154)
- Dicloxacillin (CAS 3116-76-5)
- Dicloxacillin Impurity 3 (CAS CATO-C4X-16153)
- Dicloxacillin EP Impurity B (CAS 1642576-88-2)
- Dicloxacillin Degradation Impurity (DCMICAA) (CAS 883225-99-8)
Recommended Standards
- 4,5,6,7-Tetrafluoro-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-diyl diacetate (CAS 185318-75-6)
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- 2-{[3-cyano-4-(trifluoromethyl)-5H,6H,7H,8H,9H-cyclohepta[b]pyridin-2-yl]sulfanyl}-N-[(2,4-dichlorophenyl)methyl]acetamide (CAS 626227-47-2)
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- Amlodipine Impurity 107 (CAS CATO-C4X-1095107)
- Ursodeoxycholic Acid Impurity 22 (CAS 566-24-5)
- Levonorgestrel Impurity 42 (CAS 62298-52-6)
- N-methyl-3-(pyrrolidin-1-ylsulfonyl)pyridin-4-amine (CAS 1341757-04-7)
- Fibronectin Fragment (1954-1959) (H-2068.0005) (CAS 184895-13-4)
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- (5-Fluoro-1H-benzo[d]imidazol-2-yl)methanethiol (CAS 109949-19-1)
- Des-Tyr10-Tirzepatide (CAS CATO-CPTD788680)
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