Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Addivant ULTRANOX 626 Antioxidant

Addivant ULTRANOX 626 is a high-performance phosphite antioxidant from Addivant’s ULTRANOX series, designed to protect polyolefins and engineering plastics against thermal and oxidative degradation during processing and long-term use. It offers excellent melt stability, low volatility, and synergistic effects with phenolic antioxidants.
  • addivant ultranox 626 antioxidant_6d148f79
  • addivant ultranox 626 antioxidant_6d148f79

Features Of Addivant ULTRANOX 626 Antioxidant

  1. High-performance phosphite antioxidant offering exceptional melt stability for polyolefins during processing.

  2. Excellent hydrolytic stability, minimizing degradation in humid or high-moisture processing environments.

  3. Low volatility and superior thermal stability, enabling use in high-temperature extrusion and injection molding.

  4. Compatible with a broad range of phenolic antioxidants, allowing synergistic stabilization systems.

  5. Non-staining and low-color contribution, preserving clarity and color integrity in sensitive applications.

Typical Applications Of Addivant ULTRANOX 626 Antioxidant

  1. Polypropylene (PP) fibers and nonwovens for hygiene and medical products.

  2. Automotive interior and under-hood polyolefin components requiring long-term thermal aging resistance.

  3. Food-contact compliant PP and HDPE packaging films and containers.

  4. Thin-gauge PP and PE tapes, labels, and technical films exposed to elevated processing temperatures.

  5. Recycled polyolefin formulations where enhanced stabilization against thermo-oxidative degradation is critical.

Specifications Of Addivant ULTRANOX 626 Antioxidant

Chemical TypeTris(2,4-di-tert-butylphenyl) phosphite
Product FormFree-flowing white to off-white crystalline powder
AppearanceCrystalline solid, free of visible impurities
Primary ApplicationsPolyolefins (PP, HDPE, LDPE), engineering thermoplastics
Key FeaturesMelt stabilizer, secondary antioxidant, hydrolysis-resistant phosphite
BenefitsReduces gel formation, prevents discoloration, extends polymer service life
Regulatory StatusCompliant with FDA 21 CFR §178.2010 (for food-contact use)
Storage ConditionsStore in cool, dry place below 30°C; protect from moisture and direct sunlight


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