Compass Minerals International, Inc. supplies essential minerals across the United States, Canada, the United Kingdom, and other international markets. It operates through two segments: Salt and Plant Nutrition. The Salt segment produces and sells sodium chloride and magnesium chloride products, including rock salt, evaporated salt, and brine and flake magnesium chloride, and also purchases and resells potassium chloride and calcium chloride. These products are used for deicing, chemical production, water treatment, nutrition, and other consumer and industrial applications, along with records management services. The Plant Nutrition segment produces sulfate of potash specialty fertilizers under the Protassium+ brand, turf products, and organic products, serving distributors, retailers, and growers. The company was formerly known as Salt Holdings Corporation and changed its name to Compass Minerals International, Inc. in December 2003. Founded in 1844, it is headquartered in Overland Park, Kansas.