... ,peral, used in metallurgy, petroleum,chemicals, textile,paper,printing and dyeing,soap industry. Caustic soda ,sodium hydroxide CAS: 1310-73-2 Molecular ... refined oil line,refining petroleum products, sanitation, hygiene and production chemicals. 2. Used as acidity regulator, alkali, impregnant's pigment In ... woven bags with two-layer PE inner linling Caustic soda;Sodium hydroxide