Sodium Hydroxide Solution is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. Appearance: A clear colorless liquid free from foreign matter Relative Density at 40�°C: 1.506 % Sodium Hydroxide [as NaOH]: 48.80% Sodium Hydroxide (On Dry Basis) [as NaOH] : 99.80% Sodium Carbonate [as Na2CO3]: 0.084% Chlorides [as Cl] : 0.004% Sulphate [as SO4] : 0.005% Silicates [as SiO2] : 0.003 % Copper as [as Cu]: 0.08 ppm Manganese [as Mn]: 0.06 ppm Iron [as Fe]: 4.02 ppm Matter insoluble in water: 0.010ppm