Chemical Fact Sheet

Chemical Abstract Number (CAS #) 117817
CASRN 117-81-7
Synonymsbis(2-Ethylhexyl) phthalate
1,2-Benzenedicarboxylic acid, bis(2-ethylhexyl)ester
Di(2-ethylhexyl) phthalate
Phthalic acid dioctyl ester
Diethylhexyl phthalate
Di(sec-octyl) phthalate
Analytical Methods EPA Method 525.2
EPA Method 606
EPA Method 625
EPA Method 8060
EPA Method 8061
EPA Method 8270
Molecular FormulaC24H38O4

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use IN PLASTICIZING A VARIETY OF POLYMERIC MATERIALS: NATURAL RUBBER, SYNTHETIC RUBBER CELLULOSE ACETATE BUTYRATE, ETHYL CELLULOSE, NITROCELLULOSE, POLYMETHYL METHACRYLATE, POLYVINYL BUTYRAL, POLYSTYRENE, & POLYVINYLIDINE CHLORIDE. Plasticizer manufacture; plastics manufacture & recycling, processing; organic pump fluid Organic pump fluid PLASTICIZER FOR POLYVINYL CHLORIDE RESINS PLASTICIZER FOR VINYL CHLORIDE COPOLYMER RESINS PLASTICIZER FOR OTHER RESINS & SYNTHETIC RUBBERS COMPONENT OF DIELECTRIC FLUIDS IN ELECTRICAL CAPACITATORS SOLVENT-EG, FOR ERASABLE INK ACARICIDE FOR USE IN ORCHARDS INERT INGREDIENT IN PESTICIDE FORMULATIONS VACUUM PUMP OIL TESTING AGENT FOR AIR FILTRATION SYSTEMS Plasticizer for chlorinated rubber Used widely in insect repellant formulations cosmetics, rubbing alcohol, liquid soap, detergents, decorative inks, lacquers, munitions, industrial and lubricating oils, defoaming agents during paper and paperboard manufactures, and as pesticide carriers. Phthalic Esters Photographic film, wire and cable, adhesives In vacuum pumps
Consumption Patterns PLASTICIZER FOR POLYVINYL CHLORIDE, 87%; PLASTICIZER FOR OTHER VINYL RESINS, 7%; OTHER PLASTICIZER USE, 3%; OTHER NON-PLASTICIZER USE, 3% (1979 EST) Polyvinyl chloride, 95%; other, 5% (1986) estimated
Boiling Point 230 DEG C @ 5 MM HG
Melting Point -50 DEG C
Molecular Weight 390.54
Density 0.9861 @ 20 DEG C/20 DEG C
Environmental Impact Bis-(2-ethylhexyl) phthalate (DEHP) is used as a plasticizer for polyvinylchloride (PVC) and other polymers in large quantities and is likely to be released to air and water during production and waste disposal of these plastic products. DEHP in water will biodegrade (half-life 2-3 wk), adsorb to sediments and bioconcentrate in aquatic organisms. Atmospheric DEHP will be carried long distances and be removed by rain. Human exposure will occur in occupational settings and from air, from consumption of drinking water, food (especially fish etc, where bioconcentration can occur) and food wrapped in PVC, as well as during blood transfusions from PVC blood bags.
Environmental Fate TERRESTRIAL FATE: DEHP released to soil will neither evaporate nor leach into groundwater. Limited data is available to suggest that it may biodegrade in soil under aerobic conditions following acclimation. AQUATIC FATE: DEHP released to water systems will biodegrade fairly rapidly (half-life 2-3 weeks) following a period of acclimation. It will also strongly adsorb to sediments (log Koc 4 to 5) and bioconcentrate in aquatic organisms. Evaporation and hydrolysis are not significant aquatic processes. ATMOSPHERIC FATE: DEHP released to air will be carried for long distances in the troposphere and has been detected in air over the Atlantic and Pacific Oceans . Washout by rain appears to be a significant removal process . It is unknown whether direct photolysis or photooxidation are important atmospheric processes.
Drinking Water Impact DRINKING WATER: US Cities - 0.04 to 30 ppb, 4 pos out of 10 ; 170 parts/trillion groundwater well in NY . A level of approximately 0.6 ppm DEHP was percent at the mouth of the Mississippi River. GROUNDWATER: 2.4 ppb landfill groundwater ; groundwater receiving wastewater applications to land 0.11 to 1.40 ppb . SURFACE WATER: US Industrialized river basins 132 of 203 samples pos 1 to 80 ppb(1,2,3). Concn (parts/trillion) in Mississippi River, Lake Itasca, MN (river source), 190; Cario, IL, 84; 20 miles south of Memphis, TN, 350; Carrolton St. water intake in New Orleans, LA, 64 . SEAWATER: Gulf of Mexico avg 112 parts/trillion Galveston Bay, TX - avg 600 parts/trillion, 54 to 3000 parts/trillion . Mersey Estuary, UK, 17 sites, 47% pos, dissolved fraction, 18% pos, not detected 0-67 parts/trillion, 58 parts/trillion avg pos; particulate fraction, 35% pos, 14-233 ppb (dry weight) . RAINWATER: North Pacific avg 55 parts/trillion, 5 to 213 parts/trillion . Urban College Station, TX, Feb-May, 1979, unfiltered rain, 2.6 parts/trillion avg concn . EFFL: Industries with mean concentrations of treated wastewater exceeding 200 ppb: auto and other laundries - mean 440 ppb; coal mining - mean 940 ppb; aluminum forming - mean <13,000 parts/trillion; foundries - mean 1,100 ppb . Mean concentrations in wastewaters from water-based paint plants and ink manufacturing plants 400 ppb and 12,500 ppb, respectively . DEHP has been detected in diesel exhaust . Groundwater from four USA rapid-infiltration sites for municipal primary and secondary effluents, 100% pos, 0-11-1.40 ppbm 0.55 ppb avg of 3 sites, 1 site not quantified .

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