All-rac-alfa-Tocopheryl Acetate EP Impurity A（and Diastereoisomers） CAS CATO-C4X-119518
| CAS No. | CATO-C4X-119518 |
| Molecular Formula | C31H52O3 |
| Molecular Weight | 472.74 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), All-rac-alfa-Tocopheryl Acetate EP Impurity A（and Diastereoisomers） 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 All-rac-alfa-Tocopheryl Acetate EP Impurity A（and Diastereoisomers） (CAS CATO-C4X-119518), a pharmacopoeial impurity reference standard (molecular formula C31H52O3, MW 472.74 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of All-rac-alfa-Tocopheryl Acetate EP Impurity A（and Diastereoisomers） (C31H52O3) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C31H52O3 |
| Molecular Weight | 472.74 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Recommended Standards
- All-rac-alfa-Tocopheryl Acetate EP Impurity B (and Diastereoisomers) (CAS 1560716-42-8)
- Tocopherol Impurity 20 (CAS 7695-91-2)
- D-Alfa-Tocopherol Acetate (CAS 58-95-7)
- Tocopheryl Impurity 21 (Mixture of Isomers) (CAS 37570-32-4)
- Dapoxetine Impurity 90 (CAS CATO-C4X-143990)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
- Hydrochlorothiazide Impurity N8 (CAS 4140-83-4)
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- 2-((6-Methyl-1H-indol-3-yl)methyl)malononitrile (CAS 771526-85-3)
- Ilaprazole Impurity 37 (CAS CATO-C4X-113037)
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- N-(3-Amino-4-methylphenyl)-2-(dimethylamino)acetamide dihydrochloride (CAS 1286034-30-7)
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Why CATO?
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