They dissolve in acids to form salts. Fluoride salts dissolve poorly in water, and do not form burnable hydrogen. Granulated sugar does not dissolve easily in cold drinks or ethyl alcohol. Osteopetrosis can cause bones to dissolve and break. The polymer does not dissolve into a diluent, but rather rides on the liquid propylene. Concentrated alkalis will dissolve lead and form plumbites. However, it will dissolve in hydrochloric and sulfuric acid, especially when fluorine is present. Many acetate salts are ionic, indicated by their tendency to dissolve well in water. Water can dissolve waste and foreign matter from the blood. In the body, crystalline silica particles do not dissolve over clinically relevant periods. When added directly to cold water, it does not dissolve well, however. By itself, potassium permanganate does not dissolve in many organic solvents. Acetosyringone does not dissolve well in water. Because water molecules are polar, hydrophobes do not dissolve well among them. Thrombolysis involves the administration of medication that activates the enzymes that normally dissolve blood clots.