Mohs Hardness an overview | ScienceDirect Topics
F. Yang, in Novel Fire Retardant Polymers and Composite Materials, 2017. Magnesium hydroxide. Magnesium hydroxide (Mg(OH) 2) is the second largest selling inorganic hydroxide flame is a white to offwhite crystalline powder with a specific gravity of and a Mohs hardness of around It loses % of its mass as water vapor on heating above 450°C.