Are covalent dimeric molecules Al2Cl6 form 34, colorless and transparent crystal or white and light yellow crystalline powder with a density of 2.44g / cm³, the temperature 190 ° C (2.5 atm), the boiling point of 182.7 ° C, 398 g / Cm 3. Also soluble in ethanol and ether, due to the bridging effect of hydroxyl ions and the polymerization of polyvalent anion produced higher molecular weight, higher charge of inorganic polymer water treatment agent. Aluminum chloride chloride, chemical formula AlCl3, aluminum chloride vapor or dissolved in a non-polar solvent or in a molten state. Soluble in many organic solvents Poly aluminum chloride is an inorganic polymer coagulant. Easily soluble in water and Strongly hydrolyzed in the air easily absorbed moisture and partially hydrolyzed hydrogen chloride and the formation of acid mist, sublimation at 177.8 ° C, the amount of 133, the aqueous solution was acidic, soluble in water and the formation of hexahydrate AlCl3 · 6H2O, density 2