2-Ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene CAS 320784-74-5
| CAS No. | 320784-74-5 |
| Molecular Formula | C17H20O2 |
| Molecular Weight | 256.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2-Ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene 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.
2-Ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene (CAS 320784-74-5), molecular formula C17H20O2 and molecular weight 256.34 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene (C17H20O2) is characterized by a steroid core, a hydroxyl group, an ether linkage. 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 is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C17H20O2 |
| Molecular Weight | 256.34 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
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