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EC number: 259-515-6
CAS number: 55184-72-0
The substance is abiotically stable under environmentally relevant
conditions: At pH 7 its DT-50 is > 1 year.
The substance was tested for ready biodegradability using activated
sludge and sewage under OECD 301 B testing conditions. Both studies show
that the substance is not readily biodegradable. Only maxmium 13% were
mineralized during the tests. However the mineralization plateau was not
reached yet. Hence, prolongation of the OECD 301 B study with activated
sludge shows that 57% of the substance were minalized within 60 days.
Based on this finding, the substance is inherently biodegradable.
The substance is eliminated from waste water during waste water
treatment to an extent of up to 94% by adsorption to sludge, based on
distribution modelling (QSAR STWPWIN of EPISUITE). Since the substance
is almost completely eliminated from waste water, quantities which may
enter surface waters and soil (via surface water) will be below 10%.
The log Koc value (5.41) of the substance indicates that the substance
is immobile according to FAO mobility classification, i.e. that it does
adsorb very strongly to soil or sediment.
The substance has a low potential for bioaccumulation, since its log Kow
is < 3 (0.4685). Hence, bioaccumulation is of no concern.
The CSA conducted for this substance shows that there is no risk for the
environment, since Risk Characterization Ratios for all uses of this CSR
are below 1. According to REACH Annexes VIII to X, Column 2, Specific
rules for adaptation from Column 1: Further degradation testing shall be
considered if the chemical safety assessment […] indicates the need to
investigate further the degradation of the substance”. Based on current
available data and current assessment, every usage covered by the
chemical safety assessment is safe, whatever environmental compartment
is considered. As a consequence, further studies to assess the fate of
the substance in environmental compartment surface water/sediment, soil
and groundwater are not necessary.
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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