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EC number: 407-560-9
CAS number: 107934-68-9
This adsorption/desorption study has been performed according to
the test guideline EU C.19 and in compliance with GLP applying the HPLC
screening method. Two runs were conducted and determination of the
retention time determined based on a calibration curve of reference
standards. The mean retention time of the substance was 10.93 min. This
results in a mean Koc value of 32700 and a mean Log Koc of 4.52.
Log Koc = 4.52 at 30°C (EU method C19)
A GLP guideline study using EU method C19
determined a log koc of 4.52 at 30°C (Walker and Mullee, 2007).
According to Table R.7.11-2 of the Guidance
on Information Requirements and Chemical Safety Assessment Chapter R.7c,
4,4'-(9H-fluoren-9-ylidene)bis(2-chloroaniline) should already be
considered as Hazard category 4 for soil hazard categories (log Kow > 5,
log Koc 4.5, sediment as target compartment, DT50 > 180 days, EC/LC50 <
1 mg/L) , and so the screening assessment based on EPM cannot be
applied. Therefore, it is thought unnecessary to run further testing of
adsorption/desorption since the criteria for the maximal hazard category
are already fulfilled.
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