... white powder.its molar mass is 78,density is 2.42g/cm3,and hadness is 3.0,it is not soluble in ... water ,ethnol and other organic solvents,however,it is soluble in inorganic acid and base (like hydrochloric acid, sodium hydroxide ... ,excellent whiteness,proper hardness,good compatibility and stability. aluminium hydroxide powder for pvc and rubber