Wuhan Fertchem Technology Co., Ltd. independently  researched and developed the purifying agent of wet-process phosphoric acid on the basis of traditional flocculating and settling agents, make further optimization and modification, increase largely the original settling effect of the additive, also has carried on multifunctional development of the additive, makes the impurity ions in wet-process phosphoric acid effectively react with the additive and be separated to remove,  which improves the efficiency of subsequent deep purification of wet process phosphoric acid and reduces the purification cost. The effect of the purifying agent NPA100 has been widely recognized with high economic and social benefits.