StructureTributyl phosphate (TBP)
CAS No. 126-73-8
EC No. 204-800-2
Synonyms Phosphoric acid, tri-n-butyl ester; tri-n-butyl phosphate; Butyl phosphate; Phosphoric acid tributyl ester; celluphos 4; TBP; n-Butyl Phosphate

Tributyl phosphate (TBP)

Tributyl phosphate (TBP) is an organophosphorous compound, manufactured by esterification of orthophosphoric acid with n-butanol. This colorless and odorless liquid is used in many different industries as extracting solvent, defoaming agent, flame retardant and plasticizer. TBP is a very strong, polar solvent.

Extraction & Purification

  • Electronic: Purification of rare metals, such as Hafnium and Nickel
  • Nuclear: Purification of Uranium, Zirconium, Thorium and Platinum
  • Minerals: Purification of Phosphoric acid by wet process route
  • Cellulose: Solvent and plasticizer for nitrocellulose and cellulose acetate

Flame retardant

  • Aircraft industry for hydraulic fluids
  • Automotive industry for silicone based brake fluids

Defoaming Agent

  • Oilfield: Fracturing gass wells, cementing oil mud wells
  • Construction chemicals: Concrete
  • Printing inks and paints: Continuous inkjet printing inks, pigment paste
  • Metallurgy: Metal casting
  • Detergence: Defoamer for dry cleaning and laundry

Wetting agent

  • Textile and Adhesive Industry

Shelf Life

Under proper storage conditions, the shelf life is 2 years in closed packaging.

Health & Safety

Detailed information on the product described can be found in our relevant Health and Safety Information (Material Safety Data Sheet).