cas;no:7722-88-5 properties: white powder; soluble in water but insoluble in ethanol; relative density 2.45 and melting point 890 ; deliquescent in the open air. its aqueous solution shows weak alkalinity and is stable at 70 but will be hydrolyzed into di-sodium phosphate when boiled . uses: applied in industries of detergents as detergent auxiliary, paper production to bleach and electroplating; in food industry it is used as buffering agent, emulsifier, nutrition ingredients and quality improver.