Custom Mix of Phthalate isomer mixtures Each component 1000µg/mL in isooctane 9916.26 Di-iso-nonyl phthalate in mixture with C8-10-branched alkyl o-phthalate , C9-rich 3049.28 Di-iso-decyl phthalate in mixture with C9-11-branched alkyl o-phthalate,