Carnallite, a mineral made of magnesium chloride and potassium chloride, has several synonyms that can be used in place of its name. One of the commonly known synonyms is sylvite, an alternative name for potassium chloride. It is also known as Muriate of potash or potassium muriate. The compound is used in the fertilization industry because of its high potassium content. Sylvinite, a mineral consisting of a mixture of potassium and sodium chloride, is another synonym for carnallite. Additionally, Bischofite, a hydrated magnesium chloride mineral, is sometimes referred to as carnallite. All these synonyms can be used interchangeably with carnallite depending on the context of their use.