Caustic soda NaOH 96% flake solid pearls and guaranteed sodium hydroxide. Caustic soda flake, pearl or solid Crystal, white Purity 99% 98% 96% 25/1000kg PP/PE bag Better price! High quality!Caustic sodaflake, pearl, solidSpecification:ItemFirst GradeSecond GradeNaOH99.0%Min96.0%MinNa2CO30.6%Max1.3%MaxNaCl0.1%Max2.7%MaxFe2O30.01%Max0.008%Max