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EC number: 291-454-0
CAS number: 90411-76-0
The stability of the substance towards photolysis was investigated at
two concentrations in deionised water and in an algae nutrient medium.
Conditions for radiation, ventilation and nutrient medium corresponding
those conditions used in ecotox testing. Under the same conditions, but
in the dark, test solutions at the same concentrations were performed to
serve as controls. Degradation was followed via HPLC analysis.
In deionised water half-life times of 9.2 days and 9.6 days were
determined at 10 mg/l and 32 mg/l. In OECD nutrient medium half-life
times of 3.2 days and 7.7 days at 10 mg/l and 32 mg/L were obtained. The
longer half-life time obtained in the tests at the concentration of 32
mg/l in the presence of light may be due to hindered radiation of the
molecules of the substance, as the solution was dark coloured. It is
clearly demonstrated, that the susbtance is rapidly degradable by
photolysis. Transformation products were not detected via HPLC.
Hydrolysis of the substance is not expected, based on the absence of
hydrolysable functional groups.
Biodegradation in water:
Within 28 days a degradation rate of 30 % was determined in a study for
the inherent biodegradability of the substance. The substance is
considered to be "Not Inherently Biodegradable". As only 30% of the
substance are degraded in the inherent test study design a "ready
biodegradability" of the substance can be excluded.
The bioaccumulation potential for the substance is expected to be very
low, based upon its log Kow of -4.9.
Based upon its log Kow, the adsorption/desorption potential for the
substance is expected to be very low.
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