Polyatomic Ions

carbonate

carbonate

CO3-2

bicarbonate (stock)

HCO3-

dichromate*

Cr2O7-2

hydrogen phosphate*

HPO4-2

hydrogen carbonate (classical)

HCO3

hydroxide

OH⁻

hypochlorite*

ClO-

nitrate

NO3-

nitrite

NO2-

perchlorate

ClO4-

permanganate

MnO4-

peroxide

O2-2

phosphate

PO4-3

sulfate

SO4-2

sulfite

SO3-2

chlorite

ClO2-

oxalate

C2O4-2

silicate

SiO3-2

acetate/ethanoate

C2H3O2-

ammonium

NH4+

hydrogen sulfate

HSO4-

chlorate

ClO3-

chromate

CrO4-2

cyanide

CN⁻

dihydrogen phosphate*

H2PO4-

hydrogen sulfite

HSO3-

hydrogen sulfate*

HSO4-