| Chemical Abstract Number (CAS #) |
117817
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| Synonyms | bis(2-Ethylhexyl) phthalate |
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1,2-Benzenedicarboxylic acid, bis(2-ethylhexyl)ester | Di(2-ethylhexyl) phthalate | DEHP | BEHP | Phthalic acid dioctyl ester | Diethylhexyl phthalate | Di(sec-octyl) phthalate |
| Analytical Methods |
EPA Method 525 |
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EPA Method 606 |
EPA Method 625 |
EPA Method 8060 |
EPA Method 8061 |
EPA Method 8250A |
| Molecular Formula | C24H38O4 |
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| 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
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| 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
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| Apparent Color | LIGHT COLORED LIQUID ; COLORLESS OILY LIQUID
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| Odor | SLIGHT ODOR
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| Boiling Point | 230 DEG C @ 5 MM HG
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| Melting Point | -50 DEG C
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| Molecular Weight | 390.54
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| Density | 0.9861 @ 20 DEG C/20 DEG C
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| Sensitivity Data | MAY GIVE OFF IRRITATING VAPOR @ HIGH TEMPERATURE.
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| 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.
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| 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.
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| 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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