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IGeneralState

Molecular formula Na_twoCO_threemolecular weightone hundred and five.ninenine。 Also known as soda ash. Light anhydroussodium carbonateWhitemobilityPowder, astringent. It is easily soluble in water and can form a variety of hydrates with water. Neutralize with acid，It is easy to decompose at high temperature. If exposed to the air for a long time, it will absorb water and carbon dioxide in the air, form sodium bicarbonate and form hard blocks.

IITechnical indicators(GBtwo1zero point one-two004)

finger 標 名 稱 finger 標

sodium carbonate含量（干基） % ≥ ninety-eight.eight

Sodium chloride content % ≤ 0.nine

Iron content % ≤ 0.00six

Water insoluble content % ≤ 0.ten

IIIuse Way

sodium carbonate是重要的基本化工原料之一。在玻璃工業上大量使use，廣泛應use于化學工業、Other industriesandIn people's daily life.

四、包裝andBrand:

packing:fiftyKg woven bag lined with plastic film.

Brand:Double ringCards.

quality guarantee period:1twoMore than months.

attach:sodium carbonate的結晶水and溶解性

無水sodium carbonate(純堿)為無水純品White粉末(輕質)或粒狀物(重質)，干燥的sodium carbonate具有半mobility。暴露在空氣中會吸收空氣中的水分and二氧化碳，生成碳酸氫鈉結成硬塊。

無水sodium carbonate極易溶解于水，但是溶解方法不正確時常常有不溶的情況發生。

sodium carbonate有一水物(Na_twoCO_three?H_twoO) . heptahydrate (NA)_twoCO_three?7H_twoO)and十水物(Na_twoCO_three?tenH_twoO) The three crystalline forms need to be kept stirred during the dissolution process,勿使sodium carbonate下沉集聚，Otherwise, sinking in water will form a complex of multiple crystals(呈湖石狀)，外層結晶阻止了水與內部無水sodium carbonate的接觸，導致溶解困難。