... it can be broken up into hydrogen chloride and magnesium oxide.Application:1. Metallurgy: Used to make ... flux and smelting magnesium.2. Chemical:used to make all kinds magnesium slat such as magnesium oxide, magnesium hydroxide, magnesium carbonate, cracker ... magnesia cement, artificial marble, floor, ceiling, decorative board, fireproof board, partition board, Magnesite well lid, bathtub, door and ...