... . naoh is a bright color, white, , small and uniform particles, easily dissolved.It is widely used in the ... Textile, Petroleum, Paper making, Sewage treatment, and other light industries ItemsSpecification99NaOH %≥99.0Na2CO3 %≤0.7NaCl %≤0 ... textiles and paper, in water softening and treatment, refining petroleum products, in sanitation, and hygiene products, and in the food and drug industry ...