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EC number: 927-676-8
CAS number: -
Phototransformation in air:
tests for atmospheric oxidation half-lives are intended for single
substances and are not appropriate for this complex substance. However,this
endpoint is characterized using quantitative structure property
relationships for representative hydrocarbon structures that comprise
the hydrocarbon blocks used to assess the environmental risk of this
substance with the PETRORISK model (see library tab in PETRORISK
spreadsheet attached to IUCLID Section 13).
phototransformation in air was estimated from the AOPWIN v1.92
calculations of phototransformation.
phototransformation rate of decane is 11.11 x 10-12 cm3/molecule/sec.
The calculated half-life is 0.963 d (11.552 hrs). This value is largely
below the trigger limit (2 days). Therefore, decane is not persistent.
phototransformation rate of undecane is 12.52 x 10-12 cm3/molecule/sec.
The calculated half-life is 0.854 d (10.249 hrs). This value is largely
below the trigger limit (2 days). Therefore, undecane is not persistent.
phototransformation rate for dodecane is 13.94 x 10-12 cm3/molecule/sec.
The calculated half-life is 0.767 d (9.210 hrs). This value is largely
below the trigger limit (2 days). Therefore, dodecane is not persistent.
phototransformation rate of tetradecane is 16.76 x 10-12
cm3/molecule/sec. The calculated half-life is 0.638 d (7.657 hrs). This
value is largely below the trigger limit (2 days). Therefore,
tetradecane is not persistent.
Hydrolysis is a reaction in which a water
molecule or hydroxide ion substitutes for another atom or group of atoms
present in a chemical resulting in a structural change of that chemical.
Potentially hydrolyzable groups include alkyl halides, amides,
carbamates, carboxylic acid esters and lactones, epoxides, phosphate
esters, and sulfonic acid esters. The lack of a suitable leaving group
renders compounds resistant to hydrolysis.
The chemical constituents that comprise
hydrocarbons, C12-C16, isoalkanes, cyclics, <2% aromatics, consist
entirely of carbon and hydrogen and do not contain hydrolyzable groups.
As such, they have a very low potential to hydrolyze. Therefore, this
degradative process will not contribute to their removal from the
Phototransformation in water and soil:
The direct photolysis of an organic molecule
occurs when it absorbs sufficient light energy to result in a structural
transformation. The absorption of light in the ultra violet (UV)-visible
range, 110-750 nm, can result in the electronic excitation of an organic
molecule. The stratospheric ozone layer prevents UV light of less than
290 nm from reaching the earth's surface. Therefore, only light at
wavelengths between 290 and 750 nm can result in photochemical
transformations in the environment.
A conservative approach to estimating a
photochemical degradation rate is to assume that degradation will occur
in proportion to the amount of light wavelengths >290 nm absorbed by the
molecule. Hydrocarbons, C12-C16, isoalkanes, cyclcis, <2% aromatics,
contains hydrocarbon molecules that absorb UV light below 290 nm, a
range of UV light that does not reach the earth's surface. Therefore,
this substance does not have the potential to undergo photolysis in
water and soil, and this fate process will not contribute to a
measurable degradative loss of this substance from the environment.
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