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Flake Caustic Soda , also known as caustic soda, is a inorganic compound with the chemical formula NaOH. Sodium hydroxide is strongly alkaline and highly corrosive. It can be used as an acid neutralizer, a matching masking agent, a precipitating agent, a precipitation masking agent, a color developing agent, a saponifying agent, a peeling agent, a detergent, etc. It has a wide range of uses.