METHOD OF EXTRACTING FOR 5'-GUANYLIC 2' SODIUM SALT

摘要

A method for the crystallization of di-sodium salt of 5'- guanylic acid (GMP 2Na) comprises adding a hydrophilic organic solvent to conentrated eq. soln. of GMP 2Na in the presence of Na2CO3 or NaHCO3 under the condition of 30-45 deg.C and pH 8.0-9.0. The usual amount of the carbonate is pref. 0.5 g/dl - 4 g/ dl. The hydrophilic organic solvent is pref. methanol or ethanol. GMP 2 Na is useful as a food additive.