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EC number: 925-653-7
CAS number: -
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
chemical constituents that comprise hydrocarbons, C9-C14, n-alkanes,
isoalkanes, cyclics, aromatics (2-25%), 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 environment.
Phototransformation in air:
tests for atmospheric oxidation half-lives are intended for single
substances and are not appropriate for these complex substances. In
accordance with adaptation of standard requirements (REACH Annex XI),
this endpoint is covered using quantitative structure property
relationships for representative hydrocarbon structures that comprise
the hydrocarbon blocks used to assess the environmental risk of these
substances with the PETRORISK model (see library tab in PETRORISK
spreadsheet attached to IUCLID section 13).
in water and soil:
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.
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. C9-14
Aliphatics (2-25% aromatics) contain hydrocarbon molecules that absorb
UV light below 290 nm, a range of UV light that does not reach the
earth's surface. Therefore, these substances do not have the potential
to undergo photolysis in water and soil, and this fate process will
not contribute to a measurable degradative loss of these substances
from the environment.
C10-C13, n-alkanes, isoalkanes, cyclics, aromatics (2-25%),
biodegraded 75% after 28 days under the conditions of the study and is
readily biodegradable. These data are used as read across data for
C9-14 Aliphatics (2-25% aromatics).
Aliphatics (2-25% aromatics) are hydrocarbon UVCBs. Standard tests for
this endpoint are intended for single substances and are not
appropriate for these complex substances. 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 Product Library in PETRORISK spreadsheet
attached to IUCLID section 13).
distribution of C9-14 Aliphatics (2-25% aromatics) in the
environmental compartments, air, water, soil, and sediment, has been
calculated using the PETRORISK Model, version 5.0. Computer modeling
is an accepted method for estimating the environmental distribution of
chemicals. Distribution modeling results are included in the
'Multimedia distribution modeling results' tab in the PETRORISK
spreadsheet attached to IUCLID section 13.
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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