normal temperature,it's with three hydrates.Light one is white,easily fragile or loose white powder.Odorless.Relative density is 2.2.Melting point is 350 oC.It's stable in the air.When heated to 700oC,it will become magnesium oxide.It's hardly soluble in water,but it'll bring a slight alkaline reaction.It can not be soluble in ethanol but it colud be soluble in olefine acid with sparkling.
2.It's used as drier as drier,color ficatives,anticaking agent,carrier,swelling agent,acidity regulator.

3.It is packed with polythene bag as the inner layer,and a compound plastic woven bag as the outer layer,The net weight of each bag is 25kg.