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Caustic Soda Appearance：white powder or flakes CAS No.: ********2 H.S. No.:*******0 UN No.:***3 Packing：*5/*0kgs per bag NaOH≥ *9.5 NaCO3≤ 0.*0 NaCl≤ 0.*6 Fe2O3≤ 0.**3 Ca/Mg≤ 0.*1 SiO2≤ 0.*2 Hg≤ 0.**5 Usage: as the basic chemical material, widely used in the chemical , metallurgy, paper-making , oil, textile, and domestic chemical industry my email is sales*3(at)chinashengnan(dot)com