It is also called vanillin ex polar bear, scientific name is 4-Hydroxy-3-methoxybenzaldehyde, and vanillin is white needle shape powder or pale yellow crystal powder, the melting point is 82-83℃. Vanillin is one of the most important food spices, which is important raw material of food additive. It is widely used in foods like chocolate, ice cream and beverages as well. It has the fragrance of vanilla bean and milk. It can also be used as feedstuff additive, brightener (for plating) and intermediate (for pharmacy) as well.