TRIBUTYL PHOSPHATE (TBP)
Tributyl Phosphate, or TBP, is a colourless and odourless liquid substance. TBP is an ester of orthophosphoric acid with n-butanol.
Tributyl Phosphate is used as a defoamer in paints, emulsions, adhesives, petroleum drilling, paper making industry, in detergents and ethylene glycol-based antifreezes; as a solvent for nitrocellulose, inks; for metal extraction; a stabilizer of film in oil-based lubricants; a plasticizer for cellulose esters and a wetting enhancer for various solutions.
Tributyl phosphate often serves as a component in hydraulic fluid for airlines, sometimes being the main constituent. TBP-based airline hydraulic fluids are perfect because they are not combustible.
Molecular formula: (CH3CH2CH2CH2O)3PO or C12H27O4P
Molar mass: 266.3 g/mol
No. CAS: 126-73-8
Abbreviation: TBP
| Items of Tributyl Phosphate |
Value for 98% TBP |
Value for 99% TBP |
| Appearance |
transparent, clear, odorless liquid |
| Tributyl phosphate, min content |
≥98.0 % |
≥99.0 % |
| Density at 20°C |
~0.973 g/cm³ |
~0.973 g/cm³ |
| Moisture |
≤0.35 % |
≤0.12 % |
| Acidity (as H+) |
≤1.2 mmol/100g |
≤0.2 mmol/100g |
| Refractive Index of TBP at 20°C |
1.414-1.425 |
1.423-1.425 |
| Melting point of Tributyl phosphate, °C |
-80 °C at 760 mm Hg |
| Boiling point of Tributyl phosphate, °C |
289 °C at 760 mm Hg |
| Solubility of TBP in water |
1 ml/165 ml of water |
Application of Tributyl Phosphate:
-
as a defoamer is paints, emulsions, adhesives, petroleum drilling, paper making industry, detergents and ethylene glycol-based antifreezes;
-
for hydrometallurgical extraction and purification of rare earth metals from the ores;
-
as a solvent for inks, resins, gums and adhesives;
- as a plasticizer for nitrocellulose and cellulose acetate;
- as a stable nonflammable constituent for hydraulic fluids;
- for increasing the film stability of oil-based lubricants;
- for better efficiency in application of herbicides, pesticides and fungicides;
- for wetting improvement in mercerizing liquids in textile applications;
The shelf life of Tributyl Phosphate is one year from the date of manufacture.
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