At the normal temperature, it is a kind of white or light yellow fine granules crystal or powder,odorless, salty and bitter taste, moisture absorbing. When exposed in the air, it is prone to absorbing moisture and becoms sodium sulfate hydrous. Its relative density is 2.68, melting point is 884degree.It can be mutually dissolved with water and the solution is alkaline, while in ethanol it is insoluble.