Butylphthalide Impurity 42 Potassium CAS CATO-C4X-181342
| CAS No. | CATO-C4X-181342 |
| Molecular Formula | C13H17O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Butylphthalide Impurity 42 Potassium (C13H17O3K) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.5, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 260.37 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Butylphthalide Impurity 42 Potassium (CAS CATO-C4X-181342) is a certified pharmaceutical impurity reference standard with the molecular formula C13H17O3K and a molecular weight of 260.37 g/mol.
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 | C13H17O3 K |
| Molecular Weight | 260.37 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Butylphthalide Standards
- Butylphthalide Impurity 70 (CAS 102126-70-5)
- Butylphthalide Impurity 62 (CAS 102126-71-6)
- Butylphthalide Impurity 67 (CAS 102308-43-0)
- Butylphthalide Impurity 68 (CAS 105694-44-8)
- Butylphthalide Impurity 11 (CAS 111943-62-5)
- Butylphthalide Impurity 1 (CAS 119-67-5)
- Butylphthalide Impurity 60 (CAS 1225206-60-9)
- Butylphthalide Impurity 72 (CAS 1225206-61-0)
Recommended Standards
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- Galanin Message Associated Peptide (1-41) amide trifluoroacetate salt (CAS 132699-74-2)
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