Formaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products.ormaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products.
Actually most of the salts are insoluble in water. Not all the salts include chloride!!! And of those witch contain chloride, silver, led and mercury salts are insoluble!!! chemically speaking, not all salts are soluble in a particular solvent under normal conditions..
1 A salt is soluble if it dissolves in water to give a solution with a concentration of at least 0.1 moles per liter at room temperature. 2  A salt is insoluble if the concentration of an aqueous solution is less than 0.001 M at room temperature. 3  Slightly soluble salts give solutions that fall between these extremes.