Agent Name

1,2-Benzenedicarboxylic acid, di-C9-11-branched alkyl esters, C10-rich

CAS Number




Major Category

Plastics & Rubber


C10-Rich di-C9-11-branched alkyl phthalates; Diisodecyl Phthalate; Di(C9-C11) branched alkyl phthalate; Phthalic acid, di-C9-11-branched alkyl esters, C10-rich; [ChemIDplus] DIDP; [NTP - CERHR] Diisodecyl phthalate (mixed isomers); [Reference #1] JAYFLEX DIDP; [ExxonMobil MSDS]


Phthalate Esters


Oily viscous liquid; [NTP - CERHR] Clear colorless liquid with a mild odor; [ExxonMobil MSDS]


Used as a plasticizer in a variety of PVC based products; [NTP - CERHR] Used mainly as a plasticizer for PVC plastics (95%); Also used in rubber products, anti-corrosion and anti-fouling paints, sealing compounds, and textile inks; [ExPub: Cal/EPA: OEHHA] Permitted for use as an inert ingredient in non-food pesticide products; [EPA]


Diisodecyl phthalate (DIDP) is assigned two CAS numbers: 26761-40-0 and 68515-49-1; The commercial product is a complex, but not variable, substance; The liver was shown to be the target organ of toxicity in oral studies of rats and dogs; Developmental toxicity and teratogenicity observed in rats (at doses below those maternally toxic in some studies); No reproductive toxicity observed in rats; [NTP - CERHR] Primary carbon length backbone of C10; No fetal toxicity observed in rats at doses up to 1,000 mg/kg/day; Members (and supporting chemicals) of the high molecular weight phthalate esters demonstrated no skin or eye irritation in rabbits and low acute toxicity by oral, inhalation, and dermal routes; May cause histopathological changes to liver and adverse reproductive effects; [Reference #1] May cause irritation from excessive exposure; [ExxonMobil MSDS] See "Diisodecyl phthalate" and "PHTHALATE ESTERS."

Reference Link

EPA ChAMP: Screening Level Hazard Characterization: Phthalate Esters Category - 2010

Adverse Effects

Hepatotoxin, Secondary

Links to Other NLM Databases
Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: