1,99% Purity sodium hydroxide (Flakes/Solid/Pearls) 2,water treatment,paper making, soap making, textiles, ... No.: 1310-73-2Molecular Weight: 40.00 Molecular Formula: NaOHAppearance: White flakes, solid, pearl.UseMainly used in water treatment,paper making, soap ... grade.Sodium Hydroxide %≥99.599.0Sodium Carbonate%≤0.50.8Sodium Chloride %≤0.0450.050Ferroso-ferric Oxide %≤0.0040.004Silicon Dioxide %≤0 ...