Antioxidant 626
Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7) is a phosphite-type secondary antioxidant and processing stabilizer with formula C33H50O6P2 and molecular weight ~604.7 g/mol. Commercial names include Antioxidant 626 and ADK Stab PEP 24. This phosphite is designed to scavenge radical and peroxy species and to react with hydroperoxides generated in polymer processing, thereby protecting polymers from oxidative degradation, color formation and molecular weight loss during extrusion, molding and high-temperature processing.
KieRay Chem supplies this stabilizer with controlled quality and reliable delivery to support industrial polymer processors. Our inventory management and quality assurance ensure consistent activity and low-impurity profiles, and we provide handling guidance to help customers achieve stable melt processing and prolonged polymer lifetime. KieRay Chem stands ready to support technical questions on dosing, compatibility and stabilization strategies to maximize product performance. Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite 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 26741-53-7 material is easier to qualify and reorder.
1. Secondary antioxidant for polyolefins and engineering plastics: This phosphite reacts with hydroperoxides formed during processing, preventing chain scission and preserving molecular weight and mechanical properties during extrusion, injection molding and compounding. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
2. Color stabilization: By intercepting oxidative pathways and decomposing peroxides, it reduces thermal discoloration and yellowing in heat-processed polymers and resins, improving aesthetic quality of finished parts. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
3. Synergist with hindered phenolic antioxidants: When used with primary radical scavengers (e.g., 2,6-di-tert-butylphenols), it provides a balanced stabilization package that extends long-term thermal and oxidative stability in service. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
4. Processing aid in high-temperature operations: Effective during melt processing at elevated temperatures, it minimizes volatile by-products and degradation odors, improving production yields and finished product consistency. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
5. Compatibility and dosing flexibility: Soluble and dispersible in typical polymer matrices, it is effective at low loadings; KieRay Chem can advise on optimal concentrations and masterbatch approaches for different resin systems. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
6. Supply reliability and technical support: Supplied in industrial packaging with certificates of analysis, KieRay Chem offers stable supply, storage recommendations and assistance on blending strategies to achieve robust stabilization results in large-scale manufacturing. It also helps users improve process consistency, manage production risk, and maintain predictable results across scale-up, routine manufacturing, and finished-product quality checks for Bis(2,4-di-tert-butylphenyl)pentaerythritol Diphosphite (CAS 26741-53-7).
Product Name: Antioxidant 626
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