Butylphthalide Impurity 33 CAS CATO-C4X-181333
| CAS No. | CATO-C4X-181333 |
| Molecular Formula | C24H28O4 |
| Molecular Weight | 380.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Butylphthalide Impurity 33 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Butylphthalide Impurity 33 (CAS CATO-C4X-181333) is a certified pharmaceutical impurity reference standard with the molecular formula C24H28O4 and a molecular weight of 380.48 g/mol.
The molecular framework of Butylphthalide Impurity 33 (C24H28O4) is characterized by a flavonoid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C24H28O4 |
| Molecular Weight | 380.48 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Butylphthalide Standards
- Butylphthalide Impurity 74 (CAS CATO-C4X-181374)
- Butylphthalide Impurity 34 (CAS CATO-C4X-181334)
- Butylphthalide Impurity 81 (CAS 2408731-72-4)
- Butylphthalide Impurity N6 (CAS 73959-98-5)
- Butylphthalide Impurity 43 (CAS CATO-C4X-181343)
- Butylphthalide Impurity 61 (CAS 40125-50-6)
- Butylphthalide Impurity 69 (CAS 879627-88-0)
- Butylphthalide Impurity 70 (CAS 102126-70-5)
Recommended Standards
- Fasudil Impurity 27 (CAS 5451-44-5)
- Vinpocetine EP Impurity C (CAS 70155-05-4)
- Propafenone Impurity 32 (CAS CATO-C4X-132232)
- Dyclonine Impurity 3 (CAS CATO-C4X-18813)
- Tadalafil Impurity N23 (CAS 951661-84-0)
- Bisacodyl Impurity 14 (CAS 100378-86-7)
- Clomipramine EP Impurity A DiHCl (CAS CATO-C4X-12651)
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