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Irgafos® 168

Technical Datasheet | Supplied by BASF
Irgafos® 168 by BASF is tris(2,4-di-tert.-butylphenyl)phosphite. It is a hydrolytically stable phosphite processing stabilizer. Also acts as an antioxidant. It has low volatility and is particularly resistant to hydrolysis. Provides storage stability and give the polymer long term protection against thermo-oxidative degradation. It protects polymers which are prone to oxidation, during the processing steps (compounding/pelletizing and recycling) from molecular weight change (by chain scission or crosslinking) and prevents discoloration. Irgafos® 168 is compatible with polyesters, styrene homo- and copolymers, polyolefins, olefin-copolymers such as (HDPE, LLDPE), polypropylene, polybutene and ethylenevinylacetate copolymers as well as polycarbonates, polyamides and elastomers such as BR, SEBS, SBS, and other organic substrates.
Product Type
  • Processing Aids
  • Antioxidants > Phosphites
Chemical Composition
CAS Number
Physical Form
Powder, Free-flowing
Product Status
Applications/ Recommended for
  • Other Thermoplastic > EVA
  • PA, Nylon
  • PC
  • PE > HDPE
  • PE > LLDPE
  • PP
  • Compoundings
  • Pelletizing
  • Recycling
  • Safety, regulation & environment > Low volatiles
Food contact approval

Irgafos® 168 Properties


Value & Unit
Test Condition
Test Method
Molecular Weight
646.9 g/mol
Melting Point
183 - 186 °C
Specific Gravity
(At 20°C)

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