Physicochemical properties of α-tocopherol
| IUPAC name | (2R)-2,5,7,8-Tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-3,4-dihydrochromen-6-ol |
| Molecular formula | C29H50O2 |
| Molecular weight | 430.7 g mol−1 |
| Physical description | Slightly yellow to amber, nearly odorless, clear, viscous oil |
| Melting point | 3 °C |
| Boiling point | 235 °C |
| Solubility | Insoluble in water (1.9 × 10−6 mg L−1 at 25 °C), soluble in ethanol |
| Density | 0.950 g cm−3 at 25 °C |
| Partition coefficient | log P = 12.2 |
| Stability | Unstable to UV light, alkaline, and oxidation |
| Dissociation constant | pKa = 10.8 |
| UV absorption maximum | 292 nm in ethanol |
| Fluorescence | Excitation 290–295 nm, emission 320–335 nm |
| BDE (O–H)a | 77.1 kcal mol−1 |
| IUPAC name | (2R)-2,5,7,8-Tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-3,4-dihydrochromen-6-ol |
| Molecular formula | C29H50O2 |
| Molecular weight | 430.7 g mol−1 |
| Physical description | Slightly yellow to amber, nearly odorless, clear, viscous oil |
| Melting point | 3 °C |
| Boiling point | 235 °C |
| Solubility | Insoluble in water (1.9 × 10−6 mg L−1 at 25 °C), soluble in ethanol |
| Density | 0.950 g cm−3 at 25 °C |
| Partition coefficient | log P = 12.2 |
| Stability | Unstable to UV light, alkaline, and oxidation |
| Dissociation constant | pKa = 10.8 |
| UV absorption maximum | 292 nm in ethanol |
| Fluorescence | Excitation 290–295 nm, emission 320–335 nm |
| BDE (O–H)a | 77.1 kcal mol−1 |
Bond dissociation energy.31