Product Description The sulfonated tannin is made by sulfonation and other chemical modification of gallnut tannin. The product is a free flowing pre brown powder with strong water absorption and water solubility. It is an excellent thinner or viscosity reducer in all kinds of water-based mud systems. It can effectively reduce the viscosity and shear force of mud. It can also maintain a certain viscosity reduction ability in salt water mud and saturated salt water mud, and the anti Ca2 + pollution can reach more than 1000 mg / L. At the high temperature of 180-200 â??, it can improve the high-temperature stability of the mud and control the rheological property of the mud at high temperature. It has good compatibility with other mud additives. It is also used as high temperature retarder and dispersive drag reducer for cementing slurry. Price of product ( USD price or FOB price) : USD1650.00/MT FOB Qingdao, China Product origin : CHINA Key Specifications/Special Features : "1. APPEARANCE: Black or dark brown free flowing powder 2. MOISTURE: 15%max 3. NON-SOLID PHASE MATTER: 18%min DRILLING FLUID PERFORMANCE: Item Index (Measure @24�±3â) Measure after 180â?? (16h maintenance) BASIC MUD: 100 Viscosity mpa.s: 45-65 90-120 Apparent viscosity mpa.s: 14-20 25-34 Yield point pa: 7-12 16-22 1min Gel Strength pa: 7-12 8-12 BASIC MUD ADD SMT: 100 Viscosity mpa.s: 12 14 Apparent viscosity mpa.s: 10 12 Yield point pa: 2 2 1min Gel Strength pa: 2 1 Minimum Order Size and Packaging details : "Packing: Packed in paper bags of 25kg net each Minium Order: 1MT"