Tris(2,4-di-tert-butylphenyl) Phosphite (CAS 31570-04-4), commonly known by trade names such as Irgafos 168, is a widely used phosphite antioxidant and processing stabilizer with formula C42H63O3P and molecular weight ~646.9 g/mol. This phosphite acts principally as a hydroperoxide decomposer, reacting with peroxides formed during melt processing and polymer degradation to prevent chain scission, discoloration and formation of volatile by-products. It is effective in polyolefins, PVC, engineering plastics and a variety of polymer compounding systems.
KieRay Chem supplies Tris(2,4-di-tert-butylphenyl) Phosphite with reliable quality control and appropriate packaging to support industrial usage. Our supply reliability, certificates of analysis and technical guidance ensure customers can implement effective stabilization packages and optimize processing conditions. KieRay Chem offers practical assistance on synergistic antioxidant combinations and dosing to maximize polymer lifetime and processing performance. Tris(2,4-di-tert-butylphenyl) Phosphite is selected by formulators and purchasing teams that need dependable identity, consistent handling, and repeatable performance from batch to batch. KieRay Chem supports customers with responsive technical communication, careful document control, export-ready packing, and stable supply planning. Our team can coordinate specification confirmation, sample evaluation, production scheduling, and international logistics so that this CAS 31570-04-4 material is easier to qualify and reorder.