... 6H2O 3,MW:203.33 4,Specification: white crystal .Easy to deliquescenc 1. Product: magnesium chloride2. Molecular:Mgcl2 6H2O3. MW:203 ... two crystal water molecules,110°C began to lose hydrochloric acid to break down ,intense heat to oxygen chloride when the rapid decomposition when ... is 7.5. Usage: in industry grade .it is used to make melting magnesium ,antiseptic ,and so on and it also ...