DEHP chemical supplier in chennai india

Ennore india chemicals Bis(2-ethylhexyl) phthalate (di-2-ethylhexyl phthalate, diethylhexyl phthalate, DEHP; dioctyl phthalate, DOP) is an organic compound with the formula C6H4(CO2C8H17)2. DEHP is the most common member of the class of phthalates, which are used as plasticizers. It is the diester of phthalic acid and the branched-chain 2-ethylhexanol. This colorless viscous liquid is soluble in oil, but not in water.

Production and use

The 3 stereoisomers of DEHP
Due to its suitable properties and the low cost, DEHP is widely used as a plasticizer in manufacturing of articles made of PVC. Plastics may contain 1% to 40% of DEHP. It is also used as a hydraulic fluid and as a dielectric fluid in capacitors. DEHP also finds use as a solvent in glowsticks.

Approximately three billion kilograms are produced annually worldwide. It is estimated that at least 241 million pounds of DEHP were produced in the US in 1999.

Industrial production entails the reaction of phthalic anhydride with 2-ethylhexanol:

C6H4(CO)2O + 2 C8H17OH → C6H4(CO2 C8H17)2 + H2O
2-Ethylhexanol is chiral, and the resultant DEHP consists of a mixture of (R,R)-, (S,S)-, and (R,S)-isomers (left).

PVC is used extensively in sewage pipe due to its low cost, chemical resistance, and ease of jointing. Phthalate plasticizers are essential to the utility of PVC, which is otherwise too brittle.
Manufacturers of flexible PVC articles can choose among several alternative plasticizers offering similar technical properties as DEHP. These alternatives include other phthalates such as diisononyl phthalate (DINP), di-2-propyl heptyl phthalate (DPHP), diisodecyl phthalate (DIDP), and non-phthalates such as 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH), dioctyl terephthalate (DOTP), and citrate esters