Dioctyl terephthalate (DOTP) is the ester of terephthalic acid and 2-ethylhexanol. It is a clear, colourless liquid with a slight odour, which is insoluble in water. Dioctyl terephthalate is a very important phthalate-free plasticizer for PVC, preferred over low-chain and ortho-phthalate plasticizers as it is considered a safer alternative due to its low toxicity.
Synonyms: Di-(2-ethylhexyl) terephthalate, Bis(2-ethylhexyl) terephthalate, terephthalic acid, bis(2-ethylhexyl) ester, DOTP, DEHT, bis(2-ethylhexyl) terephthalate, 168-CA Plasticizer, PA-6 Plasticizer adhesive
Applications of Dioctyl Terephthalate
Dioctyl terephthalate is primarily used as a plasticizer for PVC, and as a replacement for ortho-phthalates in a wide range of applications. As well as its uses in the plastics industry it is also commonly used in the paints and varnishes industry.
Dioctyl terephthalate is used in a number of other processes and products including the manufacture of high-temperature cables, automotive plastic parts and leatherette. It is extensively used in paper finishing in the calendaring process; also in extrusion, moulding, coatings and several ink applications as well as being patented for use in latex compositions for hair care products.
Storage and Handling
Dioctyl terephthalateshould be stored in tightly-closed containers in a cool, dry place away from naked flames and oxidizing agents. It is not classified as dangerous and can be expected to remain stable under normal storage and usage conditions.
This material should be handled in accordance with industry practices. Appropriate precautions including engineering controls and personal protective equipment should be observed. The product may cause skin irritation if contact is repeated or prolonged, as well as slight eye irritation, particularly in susceptible individuals. Risks from inhalation of vapour or mist are low due to the material’s low vapour pressure and high viscosity.