Uses In food processing industry, it is used as buffer, chelate agent, nutrient additive, emulsifier, flavor for yoghurt. 1,Chemical name Dihydrous trisodium 2-hydroxy propane-1,2,3-tricarboxylate sodium citrate.2,Molecular formula Na 3C6H5O7· 2H2O3,Molecular weight 249.104,Character Colourless or white crystalline granule or crystalline powder odourless; taste salty and acid; soluble in water, ...