5. Character: It is colorless square
crystal or white granule or crystalline powder, odorless, stabilizing in
air.  Relative density is 2.338. Melting
point is96℃-253℃.
6. Uses:    In food industry, it is used as buffering
agent, chelating agent, yeast food, flavoring agent, nutrient supplement,
fermentation adjunct, swelling agent and so on.