Common Polyatomic Ions

Tetraborate

B4O7 2-

Iodate

IO3

Phthalate

C8H4O4 2-

Benzoate

C6H5COO

Triiodide

I3

Carbide

C2 2-

Acetate

CH3COO

 

Carbonate

CO32-

Oxalate

C2O42-

Zincate

ZnO22-

Bicarbonate

HCO3

Aluminate

AlO33-

Azide

N3

Peroxide

O22-

Peroxydisulfate

S2O82-

Metasilicate

SiO32-

Vanadate

VO3

Hypochlorite

ClO

Chlorite

ClO2

Chlorate

ClO3

Perchlorate

ClO4

Permanganate

MnO4

Manganate

MnO42-

Formate

HCOO

Tellurate

TeO42-

Bisulfate

HSO4

Nitrite

NO2

 

Nitrate

NO3

Dichromate

Cr2O72-

Chromate

CrO42-

Bisulfide or Hydrosulfide

HS

Imide

NH2-

Amide

NH2

Selenate

SeO42-

Polysulfide

Sx2-

Thiocyanate

SCN

Sulfate

SO42-

Sulfite

SO32-

 

Borate

BO33-

Thiosulfate

S2O32-

Citrate

C6H5O73-

Bromate

BrO3

Arsenate

AsO43-

Tartrate

C4H4O62-

Cyanate

OCN

Cyanide

CN

Dihydrogen Phosphate

H2PO4

Phosphate

PO43-

Monohydrogen Phosphate

HPO42-

Tungstate

WO42-

Pyrophosphate

P2O74-

Orthosilicate

SiO44-

Tripolyphosphate

P3O105-

Hydronium

H3O+

Ammonium

NH4+

Hydroxide
OH
x

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