Rubber Vulcanizing Agent (Insoluble Sulfur)OT20 (IS-HS-7020 highly thermal stability) Technical Specification Appearance: Yellow Powder (Non-flying) Sulphur Content (%): 80.0±1.0 Insoluble Sulphur Content (% min.): 72 High temp. Stability (% min.) (105℃*15min): 75 Oil Content (%): 20.0±1.0 Acid Content (As H2SO4), % max.: 0.05 Heating Loss (60℃*2h), % max.: 0.40 Ash, % max.: 0.15 Fineness(100mesh), % min.: 99.8 Application: Insoluble sulphur OT20 (IS-HS-7020) had been widely used in natural rubber and a variety of synthetic rubber. They are made with Tire and rubber products such as: Rubber Belt, Rubber Pipe and Sealants etc. They are specially used in Radial Truck Tire making.