Sulfur oxoacid

Sulfur oxoacids are chemical compounds that contain sulfur, oxygen, and hydrogen. The best known and most important industrially used is sulfuric acid. Sulfur has several oxoacids; however, some of these are known only from their salts (these are shown in italics in the table below). The acids that have been characterised contain a variety of structural features, for example:
 * tetrahedral sulfur when coordinated to oxygen
 * terminal and bridging oxygen atoms
 * terminal peroxo groups
 * terminal S=S
 * chains of (−S−)n