【Perfromance and advantage】Colorless monolithic crystal. Odorless, bitter; density1.729（17℃）. Melting point: 40－50℃. Dissolving in water, oil of turpentine; insoluble in ethanol.

Quality index

1.Hyposulphite/%:≥99.0
2.Water insoluble/%：≤0.01
3.Sulfide/%：≤0.001
4.Iron/%：≤0.002
5.PH value 6.5－9.5

【Application range】 It can be used as fixing agent in sensitization industry, antichlor pulp bleaching in paper-making, detergent of medical industry, anti-oxide agent in food industry.

Content：99%