- Dioctyl terephthalate
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Dioctyl terephthalate 
Bis(2-ethylhexyl) benzene-1,4-dicarboxylateOther namesDioctyl Terephthalate; Bis(2-ethylhexyl) terephthalate; 1,4-Benzenedicarboxylic acid bis(2-ethylhexyl) esterIdentifiers Abbreviations DOTP CAS number 6422-86-2 PubChem 22932 ChemSpider 21471 EC number 229-176-9 MeSH C053316 Jmol-3D images Image 1 - O=C(OCC(CC)CCCC)c1ccc(C(=O)OCC(CC)CCCC)cc1
- InChI=InChI=1S/C24H38O4/c1-5-9-11-19(7-3)17-27-23(25)21-13-15-22(16-14-21)24(26)28-18-20(8-4)12-10-6-2/h13-16,19-20H,5-12,17-18H2,1-4H3
Properties Molecular formula C24H38O4 Molar mass 390.56 g mol−1 Appearance Clear viscous liquid Density 0.984 g/mL Boiling point 400 ºC
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references Dioctyl terephthalate (bis(2-ethylhexyl) benzene-1,4-dicarboxylate), commonly abbreviated DOTP, is an organic compound with the formula C6H4(C8H17COO)2. It is the most important phthalate-free plasticiser, being the diester of terephthalic acid and the branched-chain 2-ethylhexanol. This colourless viscous liquid is known by its safer environmental phthalate free chemistry. It possesses very good plasticizing properties.
Contents
Production
The process entails the reaction of dimethyl terephthalate with 2-ethylhexanol:
- C6H4(CO)2(OCH3)2 + 2 C8H17OH → C6H4(CO2 C8H17)2 + 2CH3OH
Use
DOTP is a general purpose safer plasticizer for safer environment than most ortophthalate plasticizers. It find uses in applications like extrusion, calendaring, injection molding, rotational molding, dip molding, slush molding and coating.[1]
Alternative plasticizers
There are several alternative plasticizers offering similar technical properties as DOTP after its phthalate free nature. These alternatives include phthalates such as DINP, DOP, DPHP, DIDP and non-phthalates e.g. DINCH and citrate esters.
References
Categories:- Ester solvents
- Plasticizers
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