Diisononyl phthalate
Encyclopedia
Diisononyl phthalate is a phthalate used as a plasticizer
Plasticizer
Plasticizers or dispersants are additives that increase the plasticity or fluidity of the material to which they are added; these include plastics, cement, concrete, wallboard, and clay. Although the same compounds are often used for both plastics and concretes the desired effects and results are...

 in e.g. food contact materials
Food contact materials
Food contact materials are materials that are intended to be in contact with food. These can be things that are quite obvious like a glass, a can for soft drinks, but also machinery in a food factory or a coffee machine....

. DINP is typically a mixture of chemical compounds consisting of various isononyl esters of phthalic acid
Phthalic acid
Phthalic acid is an aromatic dicarboxylic acid, with formula C6H42. It is an isomer of isophthalic acid and terephthalic acid. Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large...

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The European Union has set a maximum specific migration limit from food contact materials of 9 mg/kg food for the sum of diisononyl phthalates and diisodecyl phthalate
Diisodecyl phthalate
Diisodecyl phthalate is a commonly used plasticizer used in the production of plastic and plastic coating to increase flexibility...

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