吊白块

吊白块又称雕白粉，化学名称为二水合次硫酸氢钠甲醛或二水甲醛合次硫酸氢钠，为半透明白色结晶或小块，易溶于水。高温下具有极强的还原性，有漂白作用。遇酸即分解，生成钠盐和吊白块酸：NaHSO₂·CH₂O·2H₂O + H+ ==== Na+ + CH₂OHS(=O)-OH + 2H₂O(吊白块酸为弱酸)，120℃下分解产生甲醛、二氧化硫和硫化氢等有毒气体。吊白块水溶液在60℃以上就开始分解出有害物质。吊白块在印染工业用作拔染剂和还原剂，生产靛蓝染料，还原染料等。还用于合成橡胶，制糖以及乙烯化合物的聚合反应

Rongda Chemical Co.,Ltd is an export-oriented enterprise specialized in producing and marketing zinc-based chemical material. Our head company is Zhuzhou Mingqi Chemical Co.,Ltd .which was established in 2005,famous by the great performance and reputation in domestic chemical market. Actually we are biggest distributor for sodium sulfite in China. Rongda was built mainly for our export sales. Rongda has it’s own invested and cooperative facilities,and also represent some other renowned suppliers in China. The main products with yearly production capacity as below: 1) Sodium sulfite anh