Caustic Soda Technical Index: Item Specification 99% pearls99% flakesAppearance White granular White flakes Sodium hydroxide % 99% min99% minSodium carbonate % 0.9% max0.5% maxSodium chloride% 0.15%max0.04% maxFerric oxide 0.005%max0.005%max Main use: Sodium hydroxide is basic materials of chemical, widely used in the industries including chemical, medicine, food, metallurgy, metal surface treatment, oil refinery, textile auxiliary, paper making, printing dyeing, pesticide, fiber pulp sheet, synthetic detergent, glass, porcelain enamel and leather making etc.. Packing: 25kgs PP woven bags, 225kgs steel drums, 25kgs drums.