... : 1, Physico-chemical character: the density of natural VE is 0.97 g/cm3,has eight isomers, and ... antioxidant activity is δ> β> γ> α. 3,Production methods: natural VE is extracted and concentrated from vegetables(such as soybeans, rapeseed ... , etc.),the synthetic of VE is a chemosynthesis of trimethylhydroquinone and isophytol.ItemSpecificationsCharacteristicsA white or almost ...