2) USA PPG silicon dioxide(Taiwan OSC) silicon dioxide of toothpaste divides to thicker and grinding one. Colgate purchases more than 3000 tons per year, Unilever more than 2500 tons, Black man more than 1000 tons and chongqing lengsuanling more than 1000 tons. Silicon dioxide produced by this company not only can be used to clean and harden teeth, but also can improve transparency and dispersiveness, which has been acknowledged by many noted factories.

4) Sodium Lauryl Sulphate (K12) has two brand, Jixin produced by Jixing of wujiang, Jiangsu and Xinyi by Yifeng of Sichuan respectively, both of which use imported material Sand advanced producing techniques, facilities and technique. They are the most outstanding in this field within China. The products have been used in Medicine, daily chemicals, petro-chemicals and electric chemicals industries. The annual yield has reached more than 12,000tons and is among the top manufacturers of K12. Yangzhou Colgate, Unilever, Guangxi liangmianzhen, Guangzhou meichen, wuzhou ouqili have become their stable clients. In addition, more than 3000 tons of k12 is exported to South-East Asia annually.