| Chemical |
2-Ethylhexyl acetate |
| CAS-number : |
103-09-3 |
| |
| Synonyms : |
| Acetic acid, 2-ethylhexyl ester |
| Octyl acetate |
| |
| Sumformula of the chemical : |
| C10H20O2
C10H20O2 |
| EINECS-number : |
| 2030791 |
| |
| State and appearance : |
Water-white stable liquid.
|
| |
| Molecular weight : |
172.27 |
| |
| Spesicif gravity (water=1) : |
| 0.8718 |
HSDB 2001 |
| |
| Conversion factor, 1 ppm in air=_mg/m3 : |
| 7 |
mg/m3, HSDB 2001 |
| |
| Conversion factor, 1 mg/m3 in air=_ppm : |
| 0.142 |
ppm, HSDB 2001 |
| |
| Vapor pressure, mmHg : |
| 0.23 |
at 25 °C, HSDB 2001 |
| |
| Melting point, °C : |
| -80 |
HSDB 2001 |
| |
| Boiling point, °C : |
| 199 |
HSDB 2001 |
| |
| Log octanol/water coefficient, log Pow : |
| 3.74 |
HSDB 2001 |
| |
| Henry's law constant, Pa x m3/mol : |
| 151.99 |
HSDB 2001 |
| |
| Volatilization : |
The Henry's Law constant for 2-ethylhexyl acetate was estimated
as 1.5X10-3 atm cm3/mole using a fragment constant estimation
method.
This value indicates that 2-ethylhexyl acetate will
volatilize from water surfaces.
Based on this Henry's Law
constant, the volatilization half-life from a model river (1 m
deep, flowing 1 m/sec, wind velocity of 3 m/sec) is estimated
as approximately 5 hours.
The volatilization half-life from a
model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5
m/sec) is estimated as approx. 130 hours. 2-Ethylhexyl
acetate's Henry's Law constant indicates that volatilization
from moist soil surfaces is expected. 2-Ethylhexyl acetate is
expected to volatilize from dry soil surfaces based on a vapor
pressure of 0.23 mmHg at 25 °C (HSDB 2001).
|
| |
| Adsorption/desorption : |
The Koc of 2-ethylhexyl acetate is estimated as approx. 2500,
using an estimated log Kow of 3.74 and a regression-derived
equation.
According to a recommended classification scheme,
this estimated Koc value suggests that 2-ethylhexyl acetate is
expected to have slight mobility in soil (HSDB 2001).
|
| |
| Other physicochemical properties : |
Very slighty soluble in water; miscible with alcohol, oils and
other organic solvents (HSDB 2001).
|
| |
| Photochemical degradation in air : |
The rate constant for the vapor-phase reaction of 2-ethylhexyl
acetate with potochemically-produced hydroxyl radicals has been
estimated as 1.1X10-11 cm3/molecule-sec at 25 °C.
This
corresponds to an atmospheric half-life of about 35 days at an
atmospheric conc. of 5X10+5 hydroxyl radicals per cm3 (HSDB
2001).
|
| |
| Other information of degradation : |
Although no biodegradation studies have been performed on
2-ethylhexyl acetate, studies on structurally similar compounds
have shown that, in general, alkyl acetates are biodegradable
in both terrestrial ans aquatic invironments (HSDB 2001).
|
| |
| Other information of bioaccumulation : |
An estimated BCF value of 400 was calculated as approx. 2500
using an estimated log Kow of 3.74 and a regression-derived
equation.
This BCF value suggests tha bioconcentration in
aquatic organisms is high (HSDB 2001).
|
References |
| 3114 | HSDB Database 1992 -.
Hazardous Substances Data Bank.
US.
National Library of Medicine.
TOMES Plus CD-ROM.
|
