EINECS: Usage: A lactone isolated from the Kava plant (Piper methysticum). rokawain, methysticin, dihydromethysticin, yangonin, and desmethoxyyangonin are the six major kavalactones. Kava beverages and other preparations are known to be anxiolytic and are used for anxiety d isorders. a supplements. Vapour Pressur : Density: 1.2 g/cm3 Melting Point: 155-157°C Boiling Point: 487.6 °C Flash Point: 219.8 °C Packing: 1kg aluminium foil bag,25kg fiber can