Carmeuse Lime & Stone is the North American subsidiary of Belgium-based Carmeuse. It supplies lime and limestone products in North America, producing some 7 million tons annually of lime products and around 25 million tons of limestone aggregates and chemical limestone from more than 30 plants. It makes quicklime (calcium oxide), dolomitic lime (a mixture of calcium carbonate and magnesium carbonate), milk of lime, and hydrated lime (calcium hydroxide). Industrial customers use Carmeuse Lime & Stone's mineral products in steel production, water treatment, road construction, heavy construction, and other applications. The company primarily sells its products in the eastern US and Canada.