T 2256 (OTTO) Trioctyl phosphate, 97% Cas no 78-42-2 - used to finds application as a fire-retardant, plasticizer for polyvinyl chloride and cellulose nitrate. T 2256 (OTTO) Trioctyl phosphate, 97% Cas no 78-42-2 - used as a stimulant for the chemical warfare nerve agent VX. T 2256 (OTTO) Trioctyl phosphate Cas no 78-42-2 - used as an alkylation agent for nitrogen heterocyclic compounds and as a catalyst to produce phenolic and urea resins.