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Irganox® 1135

Technical Datasheet | Supplied by BASF
Irganox® 1135 by BASF is benzenepropanoic acid, 3,5-bis (1,1-dimethyl-ethyl)-4-hydroxy-C7-C9 branched alkyl esters. It is 100% active, hindered phenolic primary antioxidant for processing and long-term thermal stabilization. Irganox® 1135 prevents the formation of peroxides in the polyol during storage, transport, and further protects against scorching during foaming. Its low volatility and excellent compatibility helps to prevent fogging in automotive applications and to prevent staining of textiles (e.g. furniture, carpeting, head rests etc). Used for the stabilization of polyurethane flexible slabstock foams. Its use levels are between 0.15-0.5%.
Product Type
Antioxidants > Phenolics
Chemical Composition
Benzenepropanoic acid, 3,5-bis(1,1-dimethyl--ethyl)-4-hydroxy-C7-C9 branched alkyl esters
CAS Number
Physical Form
Colorless to slightly yellow
Product Status
Applications/ Recommended for
  • Polyurethane
  • Automotive/ Transportation
  • Fibers/ Textiles/ Carpets > Textiles (coated, impregnated)
  • Furnitures
  • Mechanical/ physical performance > Thermal resistance
  • Visual aspect & aesthetics > Antifogging
  • Safety, regulation & environment > Low volatiles
Labels/Agency Rating

Irganox® 1135 Properties


Value & Unit
Test Condition
Test Method
Melting Point
< -30 °C
Flash Point
152 °C
Vapor Pressure
0.0015 Pa
(At 25°C)

Compatiblity with other products

Find products that are predicted to be compatible with Irganox® 1135.

This list of compatible products is generated out of estimated HSP values. A practical determination of these HSP values would provide higher certainty.
Learn more about Hansen Solubility Parameters (HSP) and their use in predictive formulation.

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