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EC number: 930-690-7
CAS number: -
Summary of degradation
No data on the hydrolysis of shale oil
(heavy fraction) are available. Based on the properties of the test
substance (it is a mixture of various different compounds, not
chemically well defined with no main component, of low solubility) a
hydrolysis study is technically not feasible.
In an inherent
biodegradability study to the OECD 302C guideline, at the end of the
28-day exposure period, the mean extent of biodegradation of Shale Oil
(middle fraction) was 22%. Thus,
some compounds of the test item were biodegradable. However, the major
part of the test item was not biodegraded within 28 days of test
duration in this inherent biodegradability test. It
is considered acceptable to read-across from the middle fraction of
shale oil to the heavy fraction, on the basis that the fractions were
shown to be compositionally similar from the analytical data available.
On the basis of the results
of the study for the purpose of the risk assessment it has been
concluded that Shale Oil (heavy fraction) is: inherently biodegradable,
not fulfilling specific criteria.
No data available.
No distribution modelling data exist.
Summary of environmental
Data are not available to allow the
distribution of Shale Oil (heavy fraction) within the environment to be
modelled. In Section 1.3 the
solubility of Shale Oil (heavy
fraction) is reported as 0.1 g/L, the
Log Pow as 3.9 and the vapour pressure as 0.8 kPa at 25°C. Based
on these properties the substance would be expected to be primarily
distributed between air and soil/sediments with a low association with
Summary and discussion of
Shale oils are complex
mixtures of various different compounds which are not chemically well
defined with no main component. Therefore, the performance of a
bioaccumulation study is not possible.
Although the Log Kow of the substance is >3 it is susceptible to
biodegradation and thus the risk of bioaccumulation is low. The
BCF in fish calculated by EUSES 2.1 using the LogKow of 3.9 is 412,
which further indicates a low risk of bioaccumulation. The available
data are adequate for classification and labelling purposes and PBT
assessment, so no further testing is required. Also direct and indirect
exposure of the aquatic compartment is unlikely.
No data are available on terrestrial
bioaccumulation. However, the bioaccumulation potential of the substance
is predicted to be low. The risk of terrestrial bioaccumulation is
Shale Oils (heavy fraction) present a
low risk with regard to secondary poisoning due its low bioaccumulation
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