It is a common salt but is mainly used in research. It is a white solid that is highly soluble in water and alcohols. Uses in Prepartion products and raw materials. Lanthanum Chloride Heptahydrate is a Calcium channel blocker. Formula Cl3H14LaO7 Molar mass 371.36 g/mol CAS Number 10025-84-0 Density 2.23 g/cm3 Purity/Grade ACS Reagent Appearance Solid Melting point/freezing point 91°C (196°F) – dec.