Diisononyl phthalate

Agent Name
Diisononyl phthalate
Alternative Name
CAS Number
Major Category
Plastics & Rubber
Diisononyl phthalate formula graphical representation
DINP; 1,2-Benzenedicarboxylic acid, diisononyl ester; Baylectrol 4200; DINP; DINP2; DINP3; Diisononylphthalate; ENJ 2065; Isononyl alcohol, phthalate (2:1); JAY-DINP; Jayflex DINP; Palatinol DN; Palatinol N; Phthalic acid, diisononyl ester; Phthalisocizer DINP; Sansocizer DINP; Vestinol 9; Vestinol NN; Vinylcizer 90; Witamol 150; [ChemIDplus]
Phthalate Esters
Viscous oily liquid; [ICSC]
Used as a plasticizer for PVC and flexible vinyls; [Merck Index]
"Tumors have been detected in experimental animals but may not be relevant to humans." [ICSC] "DINP is not a pure substance, but a complex mixture containing mainly C9-branched isomers, with mean formula C26H42O4." No evidence of irritation or other adverse effects in animals exposed to saturated vapor (0.067 mg/L); No pathohistological changes noted in 344 rats fed 2000 mg/kg/day for 7 days; Depression, labored breathing, and weight loss were observed in 30 rats fed 10,000 mg/kg; All rats recovered, and there were no major necropsy findings. Rats fed 500 mg/kg/day for 3 months have liver changes; In a study of rats fed up to 1000 mg/kg/day, the conclusion was that NINP "is not teratogenic or a selective developmental toxicant." Oral LD50 (rat) >10 g/kg; Like dioctyl phthalate, it may cause CNS depression and mild liver toxicity after ingestion of large amounts; [HSDB] A very mild skin and eye irritant, based on animal studies; [CHEMINFO] May cause irritation; [MSDSonline] See "PHTHALATE ESTERS."
Biomedical References

Exposure Assessment

Vapor Pressure
5.4E-07 mm Hg
Lethal Concentration
LC50 (rat) > 4,400 mg/m3/4h

Adverse Effects

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Diseases, Processes, and Activities Linked to This Agent

Other Information
No other related information on this agent was found.