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Irganox® 259

Technical Datasheet | Supplied by BASF
HSP Distance with TPPi: 2.8
Irganox® 259 by BASF is hexamethylene bis(3-(3,5-di-tert.-butyl-4-hydroxyphenyl)propionate). It is an antioxidant. Provides excellent processing and long-term thermal stability as well as excellent initial resin color. It is an efficient, non-discoloring stabilizer for organic substrates such as plastics, synthetic fibers and elastomers. It is compatible with polyacetals, polyesters, polyolefins, polyols and polyurethanes. Irganox® 259 is recommended for use in polyacetal homopolymers and copolymers at concentrations of 0.05-0.5% and 0.05–1.0% in polyesters, polyolefins, polyols, polyurethanes and elastomers.
Product Type
Antioxidants > Phenolics
Chemical Composition
Hexamethylene bis(3-(3,5-di-tert.-butyl-4-hydroxyphenyl)propionate)
CAS Number
Physical Form
White to off-white
Product Status
Applications/ Recommended for
  • TPE and TPV > TPU (or TPE-U)
  • Other Thermoplastic > POM (Polyacetal)
  • Methacrylate-butadiene-styrene (MBS), Styrene-butadiene (SB), Polyurethane
  • Fibers/ Textiles/ Carpets > Fibers
  • Safety, regulation & environment > Low volatiles
  • Mechanical/ physical performance > Thermal resistance
  • Visual aspect & aesthetics > Color stability
Food contact approval

Irganox® 259 Properties


Value & Unit
Test Condition
Test Method
Melting Point
103 - 108 °C
Flash Point
280 °C
1.08 g/ml
(At 20°C)
SpecialChem additionnal informations based on CAS Number : 35074-77-2

Hansen Solubility Parameters

[17, 0.3, 3.8]
[δD - Dispersion force interactions, δP - Polar force interactions, δH - Hydrogen bond force interactions]

Please note, these HSP values are estimations. It is based upon the “like seeks like” principle. It splits an ingredients interactions into three parameters; δD (Dispersion force interactions), δP (Polar forces interactions) and δH (Hydrogen bond force interactions). Hansen Solubility Parameters can help you find a wide range of products that are predicted to be compatible with Irganox® 259. A practical determination of these HSP values would provide higher certainty. Learn More.

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