Butylphthalide Impurity 56 CAS 261783-87-3
| CAS No. | 261783-87-3 |
| Molecular Formula | C12H14O2 |
| Molecular Weight | 190.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Butylphthalide Impurity 56 (CAS 261783-87-3), a pharmacopoeial impurity reference standard (molecular formula C12H14O2, MW 190.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C12H14O2, Butylphthalide Impurity 56 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 190.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), Butylphthalide Impurity 56 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.
Physical & Chemical Properties
| Molecular Formula | C12H14O2 |
| Molecular Weight | 190.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Butylphthalide Standards
- Butylphthalide Impurity 41 (CAS 3413-15-8)
- Butylphthalide Impurity 23 (CAS 199736-94-2)
- Butylphthalide Impurity 35 (CAS 16692-58-3)
- Butylphthalide (CAS 6066-49-5)
- Butylphthalide Impurity 82 (CAS CATO-C4X-181382)
- Butylphthalide Impurity 7 (CAS 122654-56-2)
- Butylphthalide Impurity 9 (CAS 19666-03-6)
- Butylphthalide Impurity 32 (CAS 60510-95-4)
Recommended Standards
- Ozagrel Impurity 27 (CAS 20511-20-0)
- Nicotine Impurity 14 (CAS 125630-26-4)
- Risperidone Impurity 25 (CAS 832747-59-8)
- (Methoxy)methyl carbonate (CAS CATO-C4X-2108167)
- Trametinib impurity 12 (CAS 3018911-27-5)
- Abemaciclib Impurity N6 (CAS 1873303-31-1)
- Irinotecan Impurity 26 (CAS 2438258-39-8)
- 5-Iodo-2-methylnicotinaldehyde (CAS 1289071-76-6)
- 3-Bromo-2-(difluoromethoxy)-5-isopropylbenzoic acid (CAS 2404733-62-4)
- (5-chlorothiophen-2-yl)methanol (CAS 74168-69-7)
- 5-Chloro-2,4-difluoro-6-methoxypyrimidine (CAS 27265-89-0)
- 1-Methyl-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine-6-carbonitrile (CAS 1173146-03-6)
- 4-Chloro-2-iodo-5-methoxyaniline (CAS 1236162-19-8)
- Semaglutide impurity 24 (CAS CATO-C4X-222624)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com