Solubility product at 25°C
Order list by:           Alphabetical name     cation     anion     decreasing Ksp value  
Name molecular formula Ksp
    OH-
Barium hydroxide octahydrate Ba(OH)2•8H2O 2.55x10-04
Calcium hydroxide Ca(OH)2 5.02x10-06
Magnesium hydroxide Mg(OH)2 5.61x10-12
Manganese(II) hydroxide Mn(OH)2 2.00x10-13
Cadmium hydroxide Cd(OH)2 7.20x10-15
Cobalt(II) hydroxide (blue) Co(OH)2 5.92x10-15
Copper(I) hydroxide CuOH 2.00x10-15
Nickel(II) hydroxide Ni(OH)2 5.48x10-16
Iron(II) hydroxide Fe(OH)2 4.87x10-17
Zinc hydroxide Zn(OH)2 3.00x10-17
Copper(II) hydroxide Cu(OH)2 4.80x10-20
Lead(II) hydroxide Pb(OH)2 1.43x10-20
Beryllium hydroxide Be(OH)2 6.92x10-22
Yttrium hydroxide Y(OH)3 1.00x10-22
Praseodymium hydroxide Pr(OH)3 3.39x10-24
Mercury(II) hydroxide HgO 3.60x10-26
Europium(III) hydroxide Eu(OH)3 9.38x10-27
Tin(II) hydroxide Sn(OH)2 5.45x10-27
Scandium hydroxide Sc(OH)3 2.22x10-31
Aluminium hydroxide Al(OH)3 3.00x10-34
Gallium(III) hydroxide Ga(OH)3 7.28x10-36
Iron(III) hydroxide Fe(OH)3 2.79x10-39
Thallium(I) hydroxide Tl(OH)3 1.68x10-44
    CO32-
Lithium carbonate Li2CO3 8.15x10-04
Magnesium carbonate MgCO3 6.82x10-06
Magnesium carbonate pentahydrate MgCO3•5H2O 3.79x10-06
Magnesium carbonate trihydrate MgCO3•3H2O 2.38x10-06
Nickel(II) carbonate NiCO3 1.42x10-07
Calcium carbonate (aragonite) CaCO3 6.00x10-09
Calcium carbonate (calcite) CaCO3 3.36x10-09
Barium carbonate BaCO3 2.58x10-09
Strontium carbonate SrCO3 5.60x10-10
Zinc carbonate ZnCO3 1.46x10-10
Cobalt(II) carbonate CoCO3 1.00x10-10
Zinc carbonate monohydrate ZnCO3•H2O 5.42x10-11
Iron(II) carbonate FeCO3 3.13x10-11
Manganese(II) carbonate MnCO3 2.24x10-11
silver carbonate Ag2CO3 8.46x10-12
Cadmium carbonate CdCO3 1.00x10-12
Lead(II) carbonate PbCO3 7.40x10-14
Mercury(I) carbonate Hg2CO3 3.60x10-17
Yttrium carbonate Y2(CO3)3 1.03x10-31
Neodymium carbonate Nd2(CO3)3 1.08x10-33
    F-
Zinc fluoride ZnF2 3.04x10-02
Cadmium fluoride CdF2 6.44x10-03
Lithium fluoride LiF 1.84x10-03
Mercury(I) fluoride Hg2F2 3.10x10-06
Iron(II) fluoride FeF2 2.36x10-06
Barium fluoride BaF2 1.84x10-07
Lead(II) fluoride PbF2 3.30x10-08
Strontium fluoride SrF2 4.33x10-09
Magnesium fluoride MgF2 5.16x10-11
Calcium fluoride CaF2 3.45x10-11
Yttrium fluoride YF3 8.62x10-21
Scandium fluoride ScF3 5.81x10-24
    Cl-
Thallium(I) chloride TlCl 1.86x10-04
Lead(II) chloride PbCl2 1.70x10-05
Copper(I) chloride CuCl 1.72x10-07
silver chloride AgCl 1.77x10-10
Mercury(I) chloride Hg2Cl2 1.43x10-18
    Br-
Lead(II) bromide PbBr2 6.60x10-06
Thallium(I) bromide TlBr 3.71x10-06
Copper(I) bromide CuBr 6.27x10-09
silver bromide AgBr 5.35x10-13
Mercury(II) bromide HgBr2 6.20x10-20
Mercury(I) bromide Hg2Br2 6.40x10-23
    I-
Thallium(I) iodide TlI 5.54x10-08
Lead(II) iodide PbI2 9.80x10-09
Copper(I) iodide CuI 1.27x10-12
silver iodide AgI 8.52x10-17
Bismuth iodide BiI 7.71x10-19
Mercury(I) iodide Hg2I2 5.20x10-29
Mercury(II) iodide HgI2 2.90x10-29
    S2-
Manganese(II) sulfide (pink) MnS 3.00x10-11
Manganese(II) sulfide (green) MnS 3.00x10-14
Iron(II) sulfide FeS 8.00x10-19
Nickel(II) sulfide (alpha) NiS 4.00x10-20
Thallium(I) sulfide Tl2S 6.00x10-22
Cobalt(II) sulfide (alpha) CoS 5.00x10-22
Zinc sulfide (beta) ZnS 3.00x10-23
Zinc sulfide (alpha) ZnS 2.00x10-25
Nickel(II) sulfide (beta) NiS 1.30x10-25
Cobalt(II) sulfide (beta) CoS 3.00x10-26
Cadmium sulfide CdS 1.00x10-27
Lead(II) sulfide PbS 3.00x10-28
Copper(II) sulfide CuS 8.00x10-37
silver sulfide Ag2S 8.00x10-51
Mercury(II) sulfide (black) HgS 2.00x10-53
Mercury(II) sulfide (red) HgS 2.00x10-54
    PO43-
Lithium phosphate Li3PO4 2.37x10-04
Magnesium ammonium phosphate MgNH4PO4 3.00x10-13
Iron(III) phosphate dihydrate FePO4•2H2O 9.91x10-16
silver phosphate Ag3PO4 8.89x10-17
Aluminium phosphate AlPO4 9.84x10-21
Magnesium phosphate Mg3(PO4)2 1.04x10-24
Nickel(II) phosphate Ni3(PO4)2 4.74x10-32
Cadmium phosphate Cd3(PO4)2 2.53x10-33
Calcium phosphate Ca3(PO4)2 2.07x10-33
Cobalt(II) phosphate Co3(PO4)2 2.05x10-35
Copper(II) phosphate Cu3(PO4)2 1.40x10-37
    SO42-
Calcium sulfate CaSO4 4.93x10-05
Calcium sulfate dihydrate CaSO4•2H2O 3.14x10-05
silver sulfate Ag2SO4 1.20x10-05
Mercury(I) sulfate Hg2SO4 6.50x10-07
Strontium sulfate SrSO4 3.44x10-07
Calcium sulfate hemihydrate CaSO4•0.5H2O 3.10x10-07
Lead(II) sulfate PbSO4 2.53x10-08
Barium sulfate BaSO4 1.08x10-10
    SO32-
Barium sulfite BaSO3 5.00x10-10
silver sulfite Ag2SO3 1.50x10-14
    C2O42-
Magnesium oxalate dihydrate MgC2O4•2H2O 4.83x10-06
Manganese(II) oxalate dihydrate MnC2O4•2H2O 1.70x10-07
Strontium oxalate SrC2O4 5.00x10-08
Cadmium oxalate trihydrate CdC2O4•3H2O 1.42x10-08
Lead(II) oxalate PbC2O4 8.50x10-09
Calcium oxalate monohydrate CaC2O4•H2O 2.32x10-09
Zinc oxalate dihydrate ZnC2O4•2H2O 1.38x10-09
Copper(II) oxalate CuC2O4 4.43x10-10
silver oxalate Ag2C2O4 5.40x10-12
Mercury(I) oxalate Hg2C2O4 1.75x10-13
    ClO4-
Potassium perchlorate KClO4 1.05x10-02
Caesium perchlorate CsClO4 3.95x10-03
Rubidium perchlorate RuClO4 3.00x10-03
    BrO3-
Barium bromate Ba(BrO3)2 2.43x10-04
Thallium(I) bromate TlBrO3 1.10x10-04
silver bromate AgBrO3 5.38x10-05
    IO4-
Potassium periodate KIO4 3.71x10-04
Caesium periodate CsIO4 5.16x10-06
    IO3-
Cobalt(II) iodate dihydrate Co(IO3)2•2H2O 1.21x10-02
Nickel(II) iodate Ni(IO3)2 4.71x10-05
Calcium iodate Ca(IO3)2 6.47x10-06
Zinc iodate dihydrate Zn(IO3)2•2H2O 4.10x10-06
Thallium(I) iodate TlIO3 3.12x10-06
Calcium iodate hexahydrate Ca(IO3)2•6H2O 7.10x10-07
Strontium iodate hexahydrate Sr(IO3)2•6H2O 4.55x10-07
Manganese(II) iodate Mn(IO3)2 4.37x10-07
Strontium iodate monohydrate Sr(IO3)2•H2O 3.77x10-07
Strontium iodate Sr(IO3)2 1.14x10-07
Copper(II) iodate monohydrate Cu(IO3)2•H2O 6.94x10-08
silver iodate AgIO3 3.17x10-08
Cadmium iodate Cd(IO3)2 2.50x10-08
Barium iodate Ba(IO3)2 4.01x10-09
Barium iodate monohydrate Ba(IO3)2•H2O 1.67x10-09
Lanthanum iodate La(IO3)3 7.50x10-12
Lead(II) iodate Pb(IO3)2 3.69x10-13
    CN-
silver cyanide AgCN 5.97x10-17
Copper(I) cyanide CuCN 3.47x10-20
    SCN-
Thallium(I) thiocyanate TlSCN 1.57x10-04
silver thiocyanate AgSCN 1.03x10-12
Copper(I) thiocyanate CuSCN 1.77x10-13
Mercury(I) thiocyanate Hg2(SCN)2 3.20x10-20
Palladium(II) thiocyanate Pd(SCN)2 4.39x10-23
    AsO42-
Bismuth arsenate BiAsO4 4.43x10-10
Strontium arsenate Sr3(AsO4)2 4.29x10-19
silver arsenate Ag3AsO4 1.03x10-22
Zinc arsenate Zn3(AsO4)2 2.80x10-28
Cobalt(II) arsenate Co3(AsO4)2 6.80x10-29
Cadmium arsenate Cd3(AsO4)2 2.20x10-33
Copper(II) arsenate Cu3(AsO4)2 7.95x10-36
    CrO42-
Barium chromate BaCrO4 1.17x10-10
silver chromate Ag2CrO4 1.12x10-12
Thallium(I) chromate Tl2CrO4 8.67x10-13
Lead(II) chromate PbCrO4 3.00x10-13
    CH3COO-
silver acetate AgCH3COO 1.94x10-03
    NO3-
Barium nitrate Ba(NO3)2 4.64x10-03
Handbook of Chemistry and Physics. 64th Ed. R. C. Weast Editor. CRC Press, Inc. Boca Raton Florida. 1983-84. D-164 to D-169