Tributyl phosphate

  • Tributyl
  • TBP
  • TNBP
  • Phosphoric acid tributyl ester
  • Celluphos 4

Colorless, almost odorless liquid

Liquid

0.98 g · cm -3

-79 ° C

293 ° C

0.8 Pa ( 20 ° C)

  • Poorly in water ( 6 g · l-1 at 20 ° C)
  • Miscible with many organic solvents

1.4224 (25 ° C)

Attention

1 ml · m-3 and 11 mg · m-3

1550 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Tri -n -butyl phosphate ( usually short tributyl phosphate, TBP or TNBP called ) is a phosphoric ester. Example as defoamers in the textile and paper industry, is used as a defoamer for concrete plasticizers or as extractants in the reprocessing of spent nuclear fuel Furthermore, it found in the solvent - detergent method (S / D ) method for virus inactivation of blood plasma products application where it dissolves the lipid envelope of enveloped viruses together with a surfactant and this therefore inactivated.

The chemical formula is ( C4H9O ) 3PO. Under normal conditions (1013 mbar and 20 ° C) the substance is liquid. It is colorless and almost odorless. Other features are:

  • Very difficult to ignite (flash point 146 ° C)
  • Very slightly soluble in water
  • Low volatility
  • Vapors much heavier than air

In addition to the anhydrous tributyl there is the tributyl phosphate trihydrate CAS number 6131-90-4.

CAS registry number Celsius Vapor pressure Dangerous Substances Directive (67/548/EEC) Blood product CRC Handbook of Chemistry and Physics Digital Object Identifier
777242
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