Culinox salt is produced in vacuum pans from a chemically purified brine. It undergoes a refining process that reduces impurities such as calcium, magnesium, iron and other heavy metals. Higher purity helps assure consistent salt intensity. The end result helps to create a consistent and desired flavor and texture for this type of salt. No additives. Food Grade. Can be used in drinking water applications that require a high purity salt. It also is used in product testing in many manufacturing fields.