(chemistry) the common name for copper(II) sulfate, CuSO₄, which forms blue crystals and is used in agriculture, dyeing, electroplating and many other applications; reducing agents reduce it to the red cuprous sulfate

(inorganic chemistry) Any solution of sulfur trioxide in sulfuric acid; it contains pyrosulfuric acid, and is used in the manufacture of nitroglycerine etc.

(inorganic chemistry) A corrosive liquid, SO₃, which forms sulfuric acid on contact with water; made commercially by the oxidation of sulfur dioxide.

(chemistry) sulfurous acid

(inorganic chemistry) sulfuric acid / (inorganic chemistry) The anion HSO₄⁻ or any salt containing this anion

(inorganic chemistry) A toxic gas, H₂S, smelling like rotten eggs and used in analytical chemistry and industry.

(biochemistry) A unit comprising two or more iron atoms and bridging sulfur ligands in an iron-sulfur protein.

(biochemistry) any protein in which iron is coordinated with cysteine sulfur and sometimes also with inorganic sulfur; they have electron transfer and enzymatic function

(chemistry) Any compound having the general formula R₃P=S <=> R₃P⁺S⁻.

(chemistry) the lithium salt of sulfuric acid, Li₂SO₄; used in the treatment of manic depression etc