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EC number: 941-718-2
CAS number: -
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, C9-C11, n-alkanes, isoalkanes, <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 air:
Standard 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 Section 13).
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. This substance 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
biodegradation data are available for the registration substance itself.
However, reliable data are available for related substances in the
relevant carbon number range, including studies on similar
Fischer-Tropsch process-derived materials (GTL Solvent GS160 and GTL
In an OECD 301F manometric respirometry test
conducted in compliance with GLP, Hydrocarbons, C9-C12, n-alkanes,
isoalkanes, <2% aromatics (GTL Solvent GS170) attained 80% degradation
in 28 days (Vryenhoef, 2014a). The 10-day window criterion is not
applicable for complex substances where sequential degradation of the
constituents takes place (REACH guidance R.7b ECHA, 2017). The substance
was therefore concluded to be readily biodegradable.
Hydrocarbons, C8-C11, n-alkanes, isoalkanes,
<2% aromatics (GTL Solvent GS160) has been tested in an OECD 301F
(manometric respirometry) test conducted in compliance with GLP (Best,
2014). The test substance attained 73% biodegradation in 28 days and was
therefore considered to be readily biodegradable.
These studies are considered to be reliable
and are used as weight of evidence that Hydrocarbons, C9-C11, n-alkanes,
isoalkanes, <2% aromatics is readily biodegradable.
a supporting study, Hydrocarbons, C9-C11, n-alkanes, isoalkanes,
cyclics, <2% aromatics, biodegraded 80% after 28 days under the
conditions of the study and is readily biodegradable.
available data cover the entire carbon number range relevant to the
registration substance and the test materials contain similar chemical
structures. The results are therefore read across to Hydrocarbons,
C9-C11, n-alkanes, isoalkanes, <2% aromatics. Both tested substances
demonstrated significant biodegradation and it can therefore be
concluded that the registration substance is readily biodegradable.
Adsorption / desorption:
Substance is a hydrocarbon UVCB. Standard
tests for this endpoint 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 version 7.04 (see Product Library in PETRORISK
spreadsheet attached to Section 13).
The distribution of the substance in the
environmental compartments, air, water, soil, and sediment, has been
calculated using the PETRORISK Model, version 7.04 Computer modelling is
an accepted method for estimating the environmental distribution of
chemicals. Based on the regional scale exposure
assessment, the multimedia distribution of Hydrocarbons, C9-C11,
n-alkanes, isoalkanes, <2% aromatics is 80% to air, 4.4% to water, 2.5%
to soil and 13% to sediment. Distribution
modelling results are included in the 'Multimedia distribution modelling
results' tab in the PETRORISK spreadsheet attached to Section 13 of the
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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