Butylphthalide Impurity 57 CAS 2997796-75-3
| CAS No. | 2997796-75-3 |
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C12H14O4, Butylphthalide Impurity 57 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 222.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Butylphthalide Impurity 57 (CAS 2997796-75-3), a pharmacopoeial impurity reference standard (molecular formula C12H14O4, MW 222.24 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2004 |
Related Butylphthalide Standards
- Butylphthalide Impurity 48 (CAS 952413-01-3)
- Butylphthalide Impurity 10 (CAS 857538-11-5)
- Butylphthalide Impurity 39 (CAS 1485081-25-1)
- Butylphthalide Impurity 59 (CAS 503822-00-2)
- Butylphthalide Impurity 60 (CAS 1225206-60-9)
- Butylphthalide Impurity 62 (CAS 102126-71-6)
- Butylphthalide Impurity 72 (CAS 1225206-61-0)
- Butylphthalide Impurity 31 (CAS 96610-56-9)
Recommended Standards
- tert-Butyl hydrogen phthalate (CAS 33693-84-4)
- Esmolol Impurity 20 (CAS 2167848-51-1)
- Indobufen Impurity 92 (CAS CATO-C4X-179292)
- Esmolol Impurity 39 (CAS 54965-55-8)
- Alogliptin Impurity 8 (CAS 1820685-30-0)
- Plerixafor Impurity 16 (CAS CATO-C4X-113316)
- Ranitidine Impurity 23 (CAS CATO-C4X-137023)
- 5-Fluoro-3-methyl-2-nitroaniline (CAS 468741-19-7)
- (S)-3-Amino-3-(3-phenoxyphenyl)propanoic acid (CAS 723733-91-3)
- 2-(4-Bromophenoxy)benzaldehyde (CAS 364323-77-3)
- Pitolisant Impurity 53 (CAS CATO-C4X-252053)
- Brivaracetam Impurity 23 (CAS 3182-95-4)
- Methyl 5-(2-aminothiazol-4-yl)-2,4-dimethyl-1H-pyrrole-3-carboxylate (CAS 315694-33-8)
- Semaglutide Impurity 15 (CAS CATO-C4X-222615)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com