T 2175 (OTTO) 2,3,5-Triiodobenzoic acid, GR 99%+ Cas 88-82-4 - used to study the role of auxin flow during plant growth and development. T 2175 (OTTO) 2,3,5-Triiodobenzoic acid, GR 99%+ Cas 88-82-4 - used in the synthesis of aromatic iodine containing vinylic monomer, 2-methacryloyloxyethyl(2,3,5-triiodobenzoate) used in preparing radiopaque polymers.