Antioxidant 168

Pharmacopoeial Name: Antioxidant 168
Chemical Name: tri(2,4-Ditertrabutylphenyl)phosphiteester
CAS No.: [31570-04-4]

• Description
  Antioxidant 168 (CAS: 31570-04-4) is a phosphite secondary antioxidant, widely used for stabilizing polymers against thermal oxidative degradation during processing and servic
• Product Specifications
  

  Appearance		White powder or granules
  Melting range, °C		183.0~187.0
  Volatile content, %		≤0.30
  Solubility (2g/20ml, toluene)		Clear
  Content of 2,4-di-tert-butylphenol, %		≤2.0
  Hydrolysis resistance (95°C in water, 5h)		qualified
  Acid value, mgKOH/g		≤0.30
  Transmittance, %	425nm	≥98.0
  	500nm	≥98.0
  Content, %		≥99.0

• Product Characteristics

  Molecular Formula	C42H63O3P
  Molecular Weight	646.94
  Boiling Point	594.2±50.0 °C(Predicted)
  Melting Point	181-184 °C(lit.)
  Density	-0.98
  Flash Point	46°C (115°F)
  Solubility	Soluble in acetonitrile (small amount), chloroform (small amount), ethyl acetate (small amount, upon heating)

• Applications
  • Suitable for polyolefins (PP, PE, PVC), engineering plastics (PA, PC, ABS), elastomers, and synthetic fibers.
  • Prevents polymer discoloration, brittleness, and mechanical property loss during extrusion, injection molding, and other high-temperature processing.
  • Compatible with primary antioxidants and light stabilizers, offering synergistic protection for long-term product durability.
  • Ideal for food-contact plastics, adhesives, and coatings (complies with relevant food safety regulations).
• Packaging
  • Standard packaging: 25kg net weight per paper drum (lined with polyethylene film) or woven bag (with inner PE liner).
  • Customized packaging (e.g., 1kg, 5kg, 10kg fiber drums) available upon request for laboratory or small-batch use.

Samples and further technical data can be provided upon request.
More details, just contact: Cherry@coreychem.com