Partial list of solubility of the most commonly used copper salts in grams per 100 ml at room temperature (around 20°C/68°F), along with molecular weight and available copper percentage.
| Copper Compound | Formula | Molecular Weight (g/mol) | Available Copper % | Solubility in Water (g/100 mL @ 20°C) |
|---|---|---|---|---|
| Copper Carbonate (Basic) | CuCO3·Cu(OH)2 | 221.12 | 57.5% | Insoluble (0.0001) |
| Copper(II) Oxide (Black) | CuO | 79.55 | 79.9% | Insoluble |
| Copper(I) Oxide (Red) | Cu2O | 143.09 | 88.8% | Insoluble |
| Copper Sulfate (Pentahydrate) | CuSO4·5H2O | 249.68 | 25.5% | 32.0 g |
| Copper Oxychloride | Cu2(OH)3Cl | 213.56 | 59.5% | Insoluble |
| Copper(II) Chloride | CuCl2 | 134.45 | 47.3% | 75.7 g |
| Copper(II) Nitrate | Cu(NO3)2·3H2O | 241.60 | 26.3% | 138.0 g |
| Copper Benzoate | Cu(C7H5O2)2 | 305.77 | 20.8% | Slightly soluble |
| Copper Acetoarsenite (Paris Green) | Cu(C2H3O2)2·3Cu(AsO2)2 | 1013.79 | 25.1% | Insoluble |