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Chemical and physical properties of alpha lipoic acid
Density 1.2±0.1 g/cm3
Boiling point 362.5±11.0 °C at 760 mmHg
Melting point 60-62ºC
Molecular formula C8H14O2S2
Molecular weight 206.326
Flash point 173.0±19.3 °C
Accurate quality 206.043518
PSA 87.90000
LogP 2.16
Appearance: light yellow to yellow powder
Vapor pressure 0.0±1.7 mmHg at 25°C
Refractive index 1.562
Storage conditions
Sealed and refrigerated
Stability
Stable under normal temperature and pressure, avoid oxide contact
Water solubility ethanol: 50 mg/mL | 0.9 g/L (20 ºC)
Molecular Structure
1. Molar refractive index: 54.94
2. Molar volume (m3/mol): 169.3
3. Isotonic specific volume (90.2K): 456.4
4. Surface tension (dyne/cm): 52.7
5. Dielectric constant: not available
6. Dipole distance (10 -24cm 3): not available
7. Polarizability: 21.78
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