... Caustic Soda, akali 99% & 96% 2.Properties: Flakes, Solid, Pearls 3.Used in chemical,metallurgy,textile,medicine,pesticid. Specification of Caustic Soda: Caustic Soda NaOHNa2CO3 NaClFe2O3 99% Flakes 99 ... Max 2.5% Max 0.008% Max99% Solid 99.30% Min0.5% Max0.03% Max0.005% Max99% ... Pearls 99.35% Min0.5% Max0.03% Max0.005% Max Properties: Colorless non-transparent solid, freely deliquescent. ...