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Di-(2-Ethyl Hexyl) Phosphoric Acid TOPS®-99

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ItemUnitValue
1Chemical NameDi-(2-ethyl hexyl)phosphoric acid
2CAS Number298-07-7
3Molecular Formula(C8H17O)2P(O)OH
4Chemical Structuredfaa
5Molar Mass322.4 g/mole
6AppearanceClear, colourless to pale yellow liquid
7Boiling Point393 °C (739 °F; 666 °K)

Di-(2-Ethyl Hexyl) phosphoric acid (D2EHPA) is an Organo phosphorus compound which is pale yellow in color and is a diester of phosphoric acid and 2-ethylhexyl alcohol. In the nuclear industry it is used in combination with Tri- butyl Phosphate as nuclear solvent for extraction of Rare metals.

ItemUnitValue
Appearance--Clear, Colorless
Di Ester%>95
Mono Ester%>1.5
Water Content%<0.01
Color ( Gardner)APHA<100
Acid No.mg/gm170 - 180
Density at 20°CGm/ cc0.974 – 0.980
Ref. Index at 25°C-1.441 – 1.442
Viscosity at 20°Ccp55 - 60
Flash Point ( °C )°C150-170
Solubility of water%2.4
Solubility of water%<0.01

Available denominations: 200 Ltrs in HDPE Drums

Last Updated: 25-02-2026