This document lists common chemical formulas for ions and compounds. It includes common cations like ammonium and common anions such as acetate, carbonate, bicarbonate, and hydroxide. Other anions presented include chlorite, chlorate, perchlorate, cyanide, cyanate, thiocyanate, nitrite, nitrate, chromate, dichromate, permanganate, phosphate, hydrogenphosphate, dihydrogen phosphate, sulfite, sulfate, hydrogen sulfite, hydrogen sulfate, thiosulfate, peroxide, borate, and oxalate.