T 2315 (OTTO) Triphenyl phosphate, 99% Cas 115-86-6 - used as an internal standard in the screening and quantification of pesticide residues in vegetables and fruits. T 2315 (OTTO) Triphenyl phosphate, 99% Cas 115-86-6 - used as a plasticizer and a fire retardant in a wide variety of settings and products.