Compass Minerals International, Inc. provides essential minerals in the United States, Canada, the United Kingdom, and internationally. It operates through two segments, Salt and Plant Nutrition. The Salt segment produces, markets, and sells sodium chloride and magnesium chloride, including rock salt, mechanically and solar evaporated salt, and brine and flake magnesium chloride products; and purchases and sells potassium chloride and calcium chloride to sell as finished products or to blend with sodium chloride to produce specialty products. This segment provides products for use as a deicer for roadways, consumer, and professional use; as an ingredient in chemical production; for water treatment, human, and animal nutrition; and for various other consumer and industrial uses, as well as records management services. The Plant Nutrition segment produces sulfate of potash specialty fertilizers in various grades that are used in broadcast spreaders, direct application, and liquid fertilizer solutions under the Protassium+ brand name; turf products used by the turf and ornamental markets, as well as for blends used on golf course greens; and organic products. This segment provides its products to distributors and retailers of crop inputs, as well as growers. The company was formerly known as Salt Holdings Corporation and changed its name to Compass Minerals International, Inc. in December 2003. Compass Minerals International, Inc. was founded in 1844 and is headquartered in Overland Park, Kansas.