Industry Grade Sodium Hydroxide Apparence:flake,pearl,solid Purity:99%96% Widely used in oil refining,detergent,soap field. Product: Industry Grade Caustic Soda Pearl 99 ... raw materials for the production of soap; In the papermaking industry, it can dissolve the impurity of the wood pulp, so ... tianjin port, which make the freight more efficient and economical. Industry Grade Caustic Soda Pearl 99%