The Columbia Encyclopedia, Sixth Edition. Columbia Encyclopedia World Factbook American Heritage Coll. Like the oxide, it has many uses, e.g., in liming soil, in sugar refining, and in preparing other compounds. It is used in whitewash , mortar , and plaster. It is only slightly soluble in water, about 0.2 grams per 100 cubic centimeters, so its solutions are weakly basic.
Limewater is a clear, saturated water solution of calcium hydroxide.
It is used in medicine to treat acid burns and as an antacid. The Columbia Encyclopedia, Sixth Edition.