SODIUM ALGINATE CAS NO:9005-38-3 Molecular weight: 216 Molecular formula: C5H7O4COONa Widely applied in many industries including food additives, printing, dyeing, textile and dental.cosmetic material and paper making, our Tech-grade Sodium alginate is grouped as low, medium, high and extra high four categories according to viscosity and coarse, fine, and extra fine 3 groups as. per particle size: granular,60-80mesh,120-200mesh viscosity: LV 100-300cps,MV 300-500cps,HV 500-800cps and super high over 800cps.