Title: DINP
CAS Registry Number: 28553-12-0
CAS Name: 1,2-Benzenedicarboxylic acid diisononyl ester
Additional Names: diisononyl phthalate
Molecular Formula: C26H42O4
Molecular Weight: 418.61
Percent Composition: C 74.60%, H 10.11%, O 15.29%
Literature References: Dialkyl phthalate ester plasticizer used to impart softness and flexiblilty to PVC products. Prepn: P. J. Garner, G. Watson, US 2508911 (1950 to Shell). Effects on behavior and properties of PVC: S. V. Patel, M. Gilbert, Plast. Rubber Process. Appl. 6, 321 (1986); eidem, ibid. 8, 215 (1987). Effects of temperature on viscosity and density: L. D. Lorenzi et al., J. Chem. Eng. Data 43, 183 (1998). GC/MS determn in toys: R. Stringer et al., Environ. Sci. Pollut. Res. Int. 7, 27 (2000). Review: L. G. Krauskopf, Plast. Compd. 6, 28-38 (1983). Review of environmental fate: C. A. Staples et al., Chemosphere 35, 667-749 (1997). Review of health effects and risk assessment: C. F. Wilkinson, J. C. Lamb, Regul. Toxicol. Pharmacol. 30, 140-155 (1999); and environmental fate and toxicology: U. S. Gill et al., Rev. Environ. Contam. Toxicol. 172, 87-127 (2001).
Properties: Liquid mp -48°. bp5 mm Hg 252°. Flash point (closed cup): 213°C (415°F). d2020 0.972. nD20 1.486. Viscosity (cSt): 500 (0°); 102 (20°); 37 (37.8°); 6 (100°). Vapor pressure (mm Hg): (100°) 0.0018; (200°) 0.50; (300°) 40. Partition coefficient (octanol/water): 9.37.
Melting point: mp -48°
Boiling point: bp5 mm Hg 252°
Flash point: Flash point (closed cup): 213°C (415°F)
Index of refraction: nD20 1.486
Log P: Partition coefficient (octanol/water): 9.37
Density: d2020 0.972
Use: General purpose plasticizers for PVC applications and flexible vinyls.
Dinsed Diopterin Dioscin Dioscorea Dioscorine

Diisononyl phthalate[1]
Diisononyl phthalate.png
Abbreviations DINP
CAS number 28553-12-0 YesY, 68515-48-0
PubChem 590836
ChemSpider 513622 YesY
ChEBI CHEBI:35459 YesY
Jmol-3D images Image 1
Molecular formula C26H42O4
Molar mass 418.609 g/mol
Appearance Oily viscous liquid
Density 0.98 g/cm3
Melting point −43 °C; −45 °F; 230 K
Boiling point 244-252 °C at 0.7 kPa
Solubility in water <0.01 g/mL at 20 °C
Viscosity 64 to 265 mPa·s
Flash point 221 °C (c.c.)
Autoignition temperature 380 °C; 716 °F; 653 K
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Diisononyl phthalate (DINP) is a phthalate used as a plasticizer in e.g. food contact materials.[2] DINP is typically a mixture of chemical compounds consisting of various isononyl esters of phthalic acid.

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 phthalates.[3]

DINP was listed as a substance "known to the State of California to cause cancer" under Proposition 65 legislation on 2013-12-20.[4]