Inositol, soluble in water and acetic acid, no optical activity.Inositol is a substance widely found in food and is structurally similar to glucose. Pure inositol is a stable white crystal, soluble in water and sweet, acid, alkali and heat resistant.In animal cells, it occurs mainly in the form of phospholipids, sometimes called inositol phospholipids.In grains, it is often combined with phosphoric acid to form hexaphosphate, or phytic acid, which can combine with calcium, iron and zinc to form insoluble compounds that interfere with the absorption of these compounds by the body.But the inositol in soybean is free state.