1.Caustic soda 2.Sodium Hydroxide 3.NaOH 4.Hazard Class: 8 NaOHcaustic soda pearls ... : White solid or flakes with strong corrosiveness, easily soluble in water, presenting alkaline solution and heat liberation, presenting deliquescence ... paper. Also, in water softening and treatment, drilling mud in oil field, refining petroleum products, in sanitation, hygiene products. In food and drug ...