Water solubility of mineral compounds

Solubility is expressed as the maximum quantity of anhydrous substance, in grams, soluble in 100 g of water at the temperature in question.

Example: a maximum of 36.4 g of anhydrous aluminium sulphate can be dissolved in 100 g of water at 20°C.

Superscript numbers indicate a temperature different from that of the column head.

Some substances are considered insoluble in water; however, their solubility in water is often not as negligible as one might think. Table 2 shows the solubility of the main insoluble substances in milligrams of anhydrous salt per liter of water.

Example: in 1 L of water at 20°C, 8.5 mg of silver arsenate can be dissolved.