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Ammonium
NH4+
Acetate
CH3COO1–
Chlorite
ClO2–
Chlorate
ClO3–
Hydroxide
OH–
Nitrite
NO2–
Nitrate
NO3–
Peroxide
O2 2–
Oxalate
C2O4 2–
Chromate
CrO4 2–
Dichromate
Cr2O7 2–
Carbonate
CO3 2–
Sulfite
SO3 2–
Sulfate
SO4 2–
Phosphate
PO4 3–