Sodium citrate, also known as sodium citrate, chemical formula C6H5Na3O7, molecular weight of 258.07, is an organic compound, colorless rhomboid columnar crystals, stable in air, soluble in water and glycerol, slightly soluble in ethanol. Sodium citrate and nitrous acid, will produce nitrogen dioxide, nitric oxide and water. Reaction chemical equation: 2C6H8O7+6NaNO2==3NO+3NO2+3H2O+2C6H5O7Na3.