Weifang Shenghe Zhuji Co., Ltd is the professional producer of Thiourea Dioxide (i.e. TD, Formamidine sulfinic acid, FAS, pulp bleaching agent FAS) with the annual output of 5,000 tons. The product meets the standard of HG/T3258-2001 and is exported to many countries. Thiourea dioxide has many advantages, such as high reducibility, excellent heat stability, nonpoison, tasteless, easy operation, efficience, transportation and storage convenient etc. It is an exchange product of sodium hydrosulphite. It can be extensively used in dyeing, paper making and other industries as kinds of reduction agent, bleach, decolorizer, plastic stabilizer, antioxygen of organic synthesis and sensitiet of sensitiet.