.Tianjin YieldStone Chem Co.,Ltd...Tianjin YIELDSTONE Chem Co., Ltd. was established in 2010 and focus on International Trading of chemical materials.We have offices in China, Singapore, Vietnam and Indonesia ,and been supplying chemicals to the customers from more than 100 countries. We supply a variety of chemicals and serve customers from an array of industries like Textiles, Paper & Pulp ,Edible Oil Refining, Soap & Detergents, Food Processing & Beverages, Mining, Etc.