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Recently, sulfamic acid has been used to prepare dibutyl phthalate (4d) using about 6% catalyst loading by weight of the total reaction mixture either at 180 °C [13] or microwave conditions [14]. Dioctyl phthalate (DOP) is synthesized by using methanesulfonic acid as a catalyst at 160 °C [15].

Di (2-ethylhexyl) phthalate is produced commercially by the reaction of excess 2-ethylhexanol with phthalic anhydride in the presence of an acid catalyst such as sulfuric acid or para -toluenesulfonic acid. It was first produced in commercial quantities in Japan around 1933 and in the United States in 1939. [7]

or DOP independently. DBP is the abbreviated name of dibutyl phthalate, which has a chemical formula given by C 6H 4(COOC 4H 9) 2, a molecular weight of 278.15 and a boiling point of 320 C. On the other hand, DOP is the abbreviated name of dioctyl phthalate, which has a chemical formula given by C 6H 4(COOC 8H 17) 2, a molecular weight of

ETHYLHEXYL PHTHALATE Dioctylphthalate OCTYL PHTHALATE PHTHALIC ACID DIOCTYL ESTER BISOFLEX 81 DEHP Bis(2-Ethylhexyl) Phthalate DI(2-ETHYLHEXYL) PHTHALATE Dioctyl Phthalate 1,2-BEZENEDICARBOXYLIC ACID, BIS (2-ETHYLHEXYL) ESTER Di-Ethylhexylphthalate

Dioctyl Phthalate is one of the most widely used plasticizers in PVC due to its low cost. DOP is a general-purpose plasticizer and long-time industry standard known for its good stability to heat and ultraviolet light, and broad range of compatibility for use with PVC resins. Dioctyl Phthalate can also be used as dielectric and hydraulic fluids.