Mag Excel Exports Private Limited manufactures Colourless Crystal Calcium Hydroxide with Precise pH Value. Mag Excel Exports Private Limited holds ISO 9001:2000 quality assurance certifications. Colourless Crystal Calcium Hydroxide with Precise pH Value is obtained when calcium oxide [called lime or quicklime] is mixed, or "slaked" with water. Colourless Crystal Calcium Hydroxide with Precise pH Value can be precipitated by mixing an aqueous solution of calcium chloride and an aqueous solution of sodium hydroxide. It is comparatively rare mineral, known from some volcanic, plutonic, and metamorphic rocks. Calcium hydroxide has also been widely known to arise in burning coal dumps.