T 2020 (OTTO) Tributyl citrate, 97% Cas 77-94-1 - used in polishes, inks, nitrocellulose lacquers, as an anti-foam agent and as a plasticizer. T 2020 (OTTO) Tributyl citrate, 97% Cas 77-94-1 - used as paint additives, coating additives and processing aids. In addition to this, it is added to the zein film to enhance its mechanical properties for industrial processing.