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

SI Group AT-626 Antioxidant

SI Group AT-626 Antioxidant is a high-performance hindered phenolic antioxidant from SI Group’s AT-series, designed for polyolefins and elastomers. It offers exceptional thermal stability, low volatility, and synergistic compatibility with phosphites. Widely used in PP, PE, and TPE applications to prevent oxidative degradation during processing and long-term service life.
  • si group at 626 antioxidant_80c74354
  • si group at 626 antioxidant_80c74354

Features Of SI Group AT-626 Antioxidant

  1. High-performance hindered phenolic antioxidant offering excellent thermal and oxidative stability.

  2. Low volatility and superior migration resistance for long-term polymer protection.

  3. Excellent compatibility with polyolefins, styrenics, and engineering thermoplastics.

  4. Non-staining and low-color formation—ideal for light-colored and transparent applications.

  5. Regulatory-compliant formulation suitable for food-contact and medical-grade polymer applications (per FDA 21 CFR §178.2010 and EU Directive 10/2011).

Typical Applications Of SI Group AT-626 Antioxidant

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

  2. Automotive interior components including PP dashboards, door panels, and trim.

  3. Food packaging films and containers made from polyethylene (PE) and polypropylene (PP).

  4. Medical tubing, syringes, and disposable devices requiring biocompatibility and sterilization stability.

  5. Electrical insulation materials and cable jacketing compounds exposed to elevated service temperatures.

Specifications Of SI Group AT-626 Antioxidant

Chemical TypeHindered phenol
Product FormPellets
AppearanceWhite to off-white free-flowing pellets
Melting Point115–125 °C (by DSC)
Assay (by HPLC)≥ 98.5%
Volatile Matter (105 °C, 2 h)≤ 0.3%
Ash Content≤ 0.05%
Primary ApplicationsPolyolefins, styrenics, engineering plastics


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