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Diisooctyl phthalate is a mixture of branched C8 phthalic acid esters.
D 1900 (OTTO) Diisooctyl phthalate, 90% Cas 27554-26-3 - used as a plasticizer in polyvinyl chloride (PVC), polyvinyl acetate (PVA), rubber, cellulose plastic and polyurethane