Shandong Tutu Chemical Co.,Ltd, mainly producing chemical products including ferrous sulphate heptahydrate/monohydrate,propylene glycol and others,along with cooperating SINOPEC for long term constantly to provide qualified chemical products for domestic and overseas market. Due to our qualified products and professional service, we obtained credibility and supports from our customers worldwide, grown to be one of important chemical manufacturers in China. With over 20 years' development, we ha...