... in the Textile, Petroleum, Paper making, Sewage treatment, and other light industries. naoh is a bright color, white ... the Textile, Petroleum, Paper making, Sewage treatment, and other light industries ItemsSpecification99NaOH %≥99.0Na2CO3 %≤0.7NaCl ... , textiles and paper, in water softening and treatment, refining petroleum products, in sanitation, and hygiene products, and in the food and drug ...