The influence of impurities for quality of crystals in the process of producing the sodium metasilicate pentahydrate is studied and the maximum of impurities is proposed in this paper.

• 研究了工业生产条件下杂质含量对五水偏硅酸钠产品质量的影响，提出了保证结晶质量的方法和措施，实际生产证明具有良好的作用，产生了良好的效益。