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 标 名 称 finger 标

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。在玻璃工业上大量使use，广泛应use于化学工业、Other industriesandIn people's daily life.

四、包装andBrand:

packing:fiftyKg woven bag lined with plastic film.

Brand:Double ringCards.

quality guarantee period:1twoMore than months.

attach:sodium carbonate的结晶水and溶解性

无水sodium carbonate(纯碱)为无水纯品White粉末(轻质)或粒状物(重质)，干燥的sodium carbonate具有半mobility。暴露在空气中会吸收空气中的水分and二氧化碳，生成碳酸氢钠结成硬块。

无水sodium carbonate极易溶解于水，但是溶解方法不正确时常常有不溶的情况发生。

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(呈湖石状)，外层结晶阻止了水与内部无水sodium carbonate的接触，导致溶解困难。