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  • Product Details
Product Name:           Trioctyl phosphate; Tris(2-ethylhexyl) phosphate
Synonyms:                 TOP;2-ethylhexanol phosphate triest
CAS No.:                    78-42-2
EINECS:                     201-116-6
Molecular Formula:    C24H51O4P

Molecular Weight:      434.63

Physical properties

Melting point               -70C

Boiling point               215 C4 mm Hg(lit.)
Density                      0.92 g/mL at 20 C(lit.)
Vapor pressure          2.1 mm Hg ( 20 C)
Refractive index         n20/D 1.444(lit.)
Flash point                >230 F
Water Solubility         <0.1 g/100 mL at 18 C


Item                                                Super Grade                    First Grade

Colourity(Pt-Co),code No.                       20                                  30
Acid value,mgKOH/g                              0.10                               0.20
Density,g/cm3                                                    0.921--0.927
Content(GC),%                                     99.0                                99.0
Dioctyl phosphate content(GC),%         0.10                                0.20
Octanol content(GC),%                         0.10                                0.15
Flash point, C                                        192                                 190
Surface tension(20~25 C),mN/m          18.0                                18.0

Water content,%                                  0.15                                0.20


It is now chiefly used as a processing solvent,instead of hydroterpineol,for producing hydrogen peroxide by anthraquinone process. It is an ideal solvent in this process,for its low volatility and good extraction distribution coefficient.

It is also a cold-resisting and fire-retarding plasticizer applied in ethylenic and cellulosic resins,synthetic rubbers. The cold resisting property is superior to adipate esters.



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