Sodium Hydroxide solution 50% w/v pureSodium Hydroxide solution 50% w v pure Content: 5 LTR Physical Description: liquid caustic , absorbs CO2 from air Quality Name: pure Specification: Assay (Acidim.): 49. 5 50. 5% Chloride (Cl): 0. 01% Nitrogen compounds (as N): 0. 002% Phosphate (PO4): 0. 002 % Sulfate (SO4): 0. 01% Carbonate (as Na2CO3): 1. 0% Heavy metals (as Pb): 0. 002% Al: 0. 002 % As: 0. 00004 % Ca: 0. 005 % Cu: 0. 001 % Fe: 0. 005 % Mg: 0. 005 % Ni: 0. 001 % Pb: 0. 001 %