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Phosflex® 4

Phosflex® 4 is a tri-alkyl phosphate ester used as a plasticizer and solvent for many resin systems, such as cellulose esters, lacquers, plastic and vinyl resins. It is used for a wide variety of applications, including as a solvent extractant of rare earth metals from ores, a pigment grinding assistant, and an antifoam agent.
Phosflex® 4 is a clear, water-white, high boiling liquid. As an effective solvent, it is used in the blending of materials that are difficult to dissolve, which makes it an excellent solution for lithographic inks and the preparation of concentrates for agricultural herbicides and fungicides.

As an efficient antifoam agent, Phosflex® 4 has no residual odor, making it ideal for use in paper and protective coatings and as a defoamer in vinyl latex emulsions, rubber-based paints, casein, inks, cement, protein, resin-based adhesives and textile sizings.

CAS Number


Key Benefits

  • Very low viscosity
  • Excellent plasticizing efficiency
  • Odorless, clear, high boiling solvent
  • Excellent anti-foam properties at very low loadings
  • Good compatibility with hard-to-dissolve materials, allowing for efficient dispersions


Specific Gravity
Phosphorus Content
Viscosity mPa.s - 25°C
TGA %WT. Loss @ Temp.
2% @ 115°C 5% @ 135°C 10% @ 150°C

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