Oryzanol Impurity 7 CAS 20972-07-0
| CAS No. | 20972-07-0 |
| Molecular Formula | C38H56O4 |
| Molecular Weight | 576.85 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Oryzanol Impurity 7 (CAS 20972-07-0, C38H56O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Oryzanol Impurity 7 (C38H56O4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic 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.
As a certified reference material (CRM), Oryzanol Impurity 7 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 | C38H56O4 |
| Molecular Weight | 576.85 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Oryzanol Standards
- Oryzanol Impurity 7 (CAS 786680-88-4)
- Oryzanol Impurity 14 (CAS 106774-77-0)
- Oryzanol Impurity 16 (CAS 286011-30-1)
- Oryzanol Impurity 8 (CAS 20972-08-1)
- Oryzanol Impurity 13 (CAS 117857-70-2)
- Oryzanol impurity 15 (CAS 286011-35-6)
- Oryzanol Impurity 17 (CAS 286011-27-6)
- Oryzanol A (Cycloartenyl Ferulate) (CAS 21238-33-5)
Recommended Standards
- Triphenyl(4-(9-phenyl-9H-fluoren-9-yl)phenyl)silane (CAS 937082-80-9)
- TCO-PEG3-amide-C3-triethoxysilane (CAS 2250217-32-2)
- Eleutheroside A (CAS 474-58-8)
- Cholic Acid Impurity 2 (CAS CATO-C4X-11602)
- Tolvaptan Impurity 106 (CAS 792931-77-2)
- (S,S)-Formoterol EP Impurity H (CAS 67346-67-2)
- Empagliflozin impurity 232 (CAS CATO-C4X-1065232)
- 2-chloro-N-(4-ethyl-2,5-dioxo-4-phenylimidazolidin-1-yl)acetamide (CAS 923685-65-8)
- 2-(4-(4-Chlorophenyl)-2-methyloxazol-5-yl)acetic acid (CAS 89150-05-0)
- 1-(Adamantan-1-ylamino)propan-2-ol (CAS 447414-52-0)
- PIM447 2HCl (CAS 1820565-69-2)
- 2-(prop-2-yn-1-ylthio)nicotinic acid (CAS 1016890-69-9)
- 5-(3-Chlorophenoxymethyl)furan-2-carbaldehyde (CAS 438220-92-9)
- Tirzepatide Impurity 36 (CAS CATO-C4X-324036)
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