[Wikipedia] The sulfate or sulphate ion is a polyatomic anion with the empirical formula SO2−4. Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many are prepared from that acid.
[ChEBI] A sulfur oxoanion obtained by deprotonation of both OH groups of sulfuric acid.
Sulfate
Major ions
Chemical entity