... treatment , building. Much lower cost than caustic soda Ca(OH)2 / Hydrated lime for tanning Hydrated LimeSynonyms: calcium hydroxide,slaked lime,lime ... 1. Mainly adjust acid waste water PH value, widely used for electroplate, Chemical industry, circuit board, pickling, printing & dyeing and ... in dry ,cool and ventilate place ,it will keep good for 6 months. High purity (95%)Ca(OH)2 / Hydrated lime