2864. DEHP

Nomenclature

CAS number: 117-81-7
1,2-Benzenedicarboxylic acid bis(2-ethylhexyl) ester; bis(2-ethylhexyl) phthalate; di(2-ethylhexyl) phthalate; DOP; dioctyl phthalate; Octoil.
C24H38O4; mol wt 390.56.
C 73.81%, H 9.81%, O 16.39%.

Description and 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). Effect on dynamic mechanical properties: D. L. Hertz, Jr., Elastomerics 116, 20 (1984); interaction with PVC polymer: B. Garnaik, S. Sivaram, Macromolecules 29, 185 (1996). HPLC determn in PVC packaging: M. F. Aignasse et al., Int. J. Pharm. 113, 241 (1995). GC/MS determn in toys: R. Stringer et al., Environ. Sci. Pollut. Res. Int. 7, 27 (2000). Evaluation of carcinogenic risk: J. Doull et al., Regul. Toxicol. Pharmacol. 29, 327 (1999); of health effects: M. Fay et al., Toxicol. Ind. Health 15, 651 (1999). Review: L. G. Krauskopf, Plast. Compd. 6, 28-38 (1983). Review of environmental fate: C. A. Staples et al., Chemosphere 35, 667-749 (1997); of aquatic toxicity: idem et al., Environ. Toxicol. Chem. 16, 875 (1997); of toxicology and human exposure: Toxicological Profile for Di(2-ethylhexyl)phthalate (PB2003-100138, 2002) 337 pp.

Chemical structure

Properties

Liquid, mp -47°. bp5mm Hg 231°. Flash point (closed cup): 206°C (403°F). d2020 0.986. nD20 1.486. Viscosity (cSt): 386 (0°); 22 (20°); 31 (37.8°); 5 (100°). Vapor pressure (mm Hg): (100°) 0.003; (200°) 1.20; (300°) 96.

Caution

Potential symptoms of overexposure are irritation of eyes and mucous membranes. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 118. This substance is reasonably anticipated to be a human carcinogen: Report on Carcinogens, Eleventh Edition (PB2005-104914, 2004) p III-123.

Use

As plasticizer in PVC applications and flexible vinyls.