Tri Phenyl Phosphate (TPPA) is an oligomeric phosphoric acid ester of phenol. It is a colorless, odorless, and non-toxic liquid. It is an excellent plasticizer/lubricant for plastics, rubber, and other polymers. TPPA is used in a variety of applications, including coatings, adhesives, printing inks, and lubricants. It is also used in the manufacture of pharmaceuticals, pesticides, and fungicides.