Butylphthalide Impurity 64 CAS 950681-49-9
| CAS No. | 950681-49-9 |
| Molecular Formula | C12H13BrO2 |
| Molecular Weight | 269.13 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Butylphthalide Impurity 64 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.
CATO supplies Butylphthalide Impurity 64 (CAS 950681-49-9), a pharmacopoeial impurity reference standard (molecular formula C12H13BrO2, MW 269.13 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C12H13BrO2, Butylphthalide Impurity 64 contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 269.13 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C12H13BrO2 |
| Molecular Weight | 269.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
Related Butylphthalide Standards
- Butylphthalide Impurity 63 (CAS 950681-35-3)
- Butylphthalide Impurity 65 (CAS 950681-33-1)
- Butylphthalide Impurity 66 (CAS 950681-46-6)
- Butylphthalide Impurity 73 (CAS CATO-C4X-181373)
- Butylphthalide Impurity 44 (CAS CATO-C4X-181344)
- Butylphthalide Impurity 36 (CAS 2245275-82-3)
- Butylphthalide Impurity 83 (CAS CATO-C4X-181383)
- Butylphthalide Impurity 29 (CAS CATO-C4X-181329)
Recommended Standards
- Ethyl 4-bromomethylcinnamate (CAS 60682-98-6)
- Methyl 1-(4-(bromomethyl)phenyl)cyclopropanecarboxylate 873372-30-6 A1-09524 (CAS 873372-30-6)
- Abemaciclib Impurity 185 (CAS 871258-57-0)
- Ozagrel Impurity 3 (CAS 78712-67-1)
- Maxacalcitol Impurity 6 (CAS 514224-59-0)
- Levocarnitine Impurity 43 (CAS 6538-82-5)
- Cenobamate Impurity 37 (CAS CATO-C4X-241637)
- 2,4-Dichloro-3,5,6-trifluoroaniline (CAS 4125-57-9)
- 4-Chloro-5-methyl-1H-indole (CAS 162100-43-8)
- Ethyl 8-(4-heptyloxyphenyl)-8-oxooctanoate (CAS 898758-03-7)
- 2-[5-(2,4-Dichlorophenyl)-1H-pyrazol-1-yl]-4-(4-methoxyphenyl)-1,3-thiazole (CAS 956977-62-1)
- Methyl 6-(4-methoxyphenyl)-3-methylisoxazolo[5,4-b]pyridine-4-carboxylate (CAS 924221-72-7)
- Methyl 2-amino-2-(2,5-dimethoxyphenyl)acetate (CAS 1218122-03-2)
- D-Lys16-Tirzepatide (CAS CATO-CPTD788918)
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