Rubber Vulcanizing Agent (Insoluble Sulfur)OT20 (IS-HS-7020 highly thermal stability) Technical Specification Appearance: Yellow Powder (Non-flying) Sulphur Content (%): 80.0í+1.0 Insoluble Sulphur Content (% min.): 72 High temp. Stability (% min.) (105íµ*15min): 75 Oil Content (%): 20.0í+1.0 Acid Content (As H2SO4), % max.: 0.05 Heating Loss (60íµ*2h), % max.: 0.40 Ash, % max.: 0.15 Fineness(100mesh), % min.: 99.8