TricresyI Phosphate

TricresyI Phosphate

TricresyI Phosphate (TCP), also called tricresylphosphate, tritolyl phosphate, tolyl phosphate, or tri-o-tolyl ester of phosphoric acid, is an organic compound, an organophosphate, an ester of phosphoric acid.

  • Leather cloth (PVC): Upholstery, Book binding. Seat covers
  • Utility articles: Footwear, Raincoats, Handbags, Fiberglass, cellulose acetate
  • Extruded articles: Cables (PVC & rubber), hoses, flexible pipe, coal mining, conveyor belts
  • Coatings: Nitrocellulose lacquers, phenolic resins, lube oils


  • TCP is used plasticizers for vinyl films in agriculture due to its weather resistance property
  • Insulator compounds for electric cables and also in the synthetic rubber compounds.
  • Lubricant additive and has been proven effective as mild extreme pressure addictive for synthetic oil.
  • Based oil for fire-retardant hydraulic fluid for minimizing fire-risk from heat source or electric sparks.
  • TCP is useful in the clear and dark coloured flame-retardant sheeting where pigmenting or opecifying flame retardants are undesirable


Parameters TCP
Structure (CH3 C6 H4 O)3 P
CAS No 1330 – 78 – 5
Category Flame retardant,
Form Colorless to Pale Yellow Liquid
Specific gravity at 25 °C 1.165 – 1.175
Acidic Value, mg KOH / gm 0.5 max
Refractive Index at 25 °C 1.540 – 1.560
Phosphorous Content % 8.4 – 8.5 %