Seawater

From a chemical perspective, seawater is a saline, aqueous solution. The salinity of individual seas varies from 0.3 to 1.7 % (Baltic Sea) to 28 % (Dead Sea). The sea salt contained in seawater consists mainly of sodium chloride (common salt). Sea salt also contains magnesium chloride, magnesium sulphate, calcium sulphate, potassium chloride and calcium carbonate, and traces of other salts (also see Chemical resistance table).