Featuring exclusive T-type phenyl molecular structure, IOTA 233 is customized for all phenyl silicone systems. Its refractive index of 1.46–1.52 can perfectly match vinyl phenyl silicone raw materials, delivering outstanding heat resistance to cured finished products. Multiple grades of viscosity and hydrogen content are available to flexibly adjust crosslink density, so the hardness and elasticity of silicone rubber and resin can be tailored as required. It features stable physical and chemical indicators with minor batch fluctuation, and will not impair platinum-catalyzed addition systems. The curing process proceeds smoothly without bubbles or precipitation. Its superior miscibility works well for pure phenyl and methyl-phenyl blended systems with no turbidity or delamination. The high flash point ensures safe workshop production, and sealed coated iron drums prevent moisture contamination during storage and transportation. As the core crosslinker for phenyl silicone materials, it steadily improves heat resistance and anti-aging performance of finished goods, making it an essential raw material for mass production of high-temperature-resistant phenyl silicone products.