Polyatomic anions

triiodide

I₃^-

superoxide

O₂^-

hydroxide

OH^-

cyanide

CN^-

thiocyanate

SCN^-

nitrate

NO₃^-

nitrite

NO₂^-

sulfite

SO₃^2-

bisulfite

HSO₃^-

sulfate

SO₄^2-

bisulfate

HSO₄^-

bicarbonate

HCO₃^-

carbonate

CO₃^2-

acetate

CH₃CO₂^-

hydrogen phosphate

HPO₄^2-

dihydrogen phosphate

H₂PO₄^-

phosphate

PO₄^3-

phosphite

PO₃^3-

hypochlorite

ClO^-

chlorite

ClO₂^-

chlorate

ClO₃^-

perchlorate

ClO₄^-

permanganate

MnO₄^-

chromate

CrO₄^2-

dichromate

Cr₂O₇^2-