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Irganox® 1425

Technical Datasheet | Supplied by BASF
Irganox® 1425 by BASF is a high molecular weight, multifunctional phenolic primary antioxidant for processing and long-term thermal stabilization. It contains phosphorus and is highly efficient, non discoloring stabilizer for organic substrates. Offers protection against thermo-oxidative degradation and high resistance to extraction. Also, used as esterification catalyst for the preparation of rosin esters. Irganox® 1425 is compatible with polyolefins, polyesters, and crosslinked elastomers (e.g. NBR). It is recommended for applications requiring improved extraction resistance, low volatility, excellent color and color stability and superior gas-fading resistance. It can be used alone or in combinations with other Irganox, Irgafos, Chimassorb, Uvinul or Tinuvin stabilizers and co-stabilizers. The recommended concentration is 0.05–0.25%.
Product Type
Antioxidants > Phenolics
Chemical Composition
(1,1-Di-tert.-butyl)-4-hydroxyphenyl)methyl) ethylphosphonate
CAS Number
Physical Form
Powder, Free-flowing
Product Status
Applications/ Recommended for
  • Other Rubber > NBR
  • Other Thermoplastic > Other Polyester
  • TPE and TPV
  • Polybutene, Polyurethane
  • Fibers/ Textiles/ Carpets > Fibers
  • Safety, regulation & environment > Low volatiles
  • Visual aspect & aesthetics > Coloration
  • Visual aspect & aesthetics > Color stability

Irganox® 1425 Properties


Value & Unit
Test Condition
Test Method
Molecular Weight
695 g/mol
Melting Point
> 260 °C
Flash Point
> 150 °C

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