PhosflexTM 4


PhosflexTM 4

Chemical Name:
Tributyl Phosphate
CAS Number:
Phosphorus content (%):
Molecular Weight:

General & Use:

PhosflexTM 4 is a plasticizer and solvent for 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, pigment grinding assistant, and antifoam agent. PhosflexTM 4, is a clear, water-white, high boiling liquid.PhosflexTM 4 is an effective solvent and is used in blending of materials, which are difficult to dissolve. This characteristic makes PhosflexTM 4 an excellent solvent for lithographic inks and in the preparation of concentrates for agricultural herbicides and fungicides. It can also be used as a solvent for natural gums and synthetic resins. PhosflexTM 4 is also used for solvent extraction, sometimes called liquid-liquid extraction, of numerous rare earth metals. It is used as a sole agent or in combination with other chemicals for the extraction of uranium from its ores. As an efficient antifoam agent, PhosflexTM 4 has no residual odor, making it ideal for use in paper and protective coatings. Tributyl phosphate is utilized, for example, as a defoamer in vinyl latex emulsions, rubber-based paints, casein, inks, cement, protein- or resin-based adhesives, and textile sizings. Normally, less than one percent by weight addition is sufficient to prevent undesirable foaming. Used with a small amount of isopropanol or similar material, tributyl phosphate will destroy or prevent foam in most detergent solutions. In anti-freeze solutions of the ethylene glycol-borax type, tributyl phosphate sharply reduces foaming. It is similarly useful in the manufacture and packaging of latex paints and some floor polishes. The surfactant and antifreeze characteristics of this product

Typical Properties:


Physical Appearance
clear transparent liquid

Phosphorus Content (Wt.%)

Density @ 20°C (Kg/m³)

Viscosity @ 25°C (mPa.s)

Acidity (mg KOH/g)

Water Content (Wt.%)

Color APHA

Specific Heat (cal/g)

Heat of Vaporization (cal/g)

Assay (Wt.%)

Thermogravimetric Analysis (10°C/min, air)

Weight Loss, % 0C
2 115
5 135
10 150


Please note that the values indicated do not constitute specification limits. To obtain current specifications, refer to your local Sales Office/Representative or ICL-IP Head Office at address herein.

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