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EC number: 205-250-6
CAS number: 136-52-7
A seven day transformation/dissolution test according to the OECD
guideline 29 and the GHS (Annex 10) protocol was run on Co2Et at a mass
loading of 10 and 100 mg/L, at a pH of 6.0. Also a 28 day
transformation/dissolution was run on Co2Et at a mass loading of 1 mg/L
and at a pH of 6.0. Under the conditions of this test, the dissolution
of Co2Et is 127.7 µg/L for the 28 -day endpoint (1 mg/L loading), 1405.1
µg/L for the 7-day endpoint (10 mg/L loading) and 14300.2 µg/L for the
7-day endpoint (100 mg/L loading).
Water solubility of cobalt
bis(2-ethylhexanoate) (flask method, guideline study results): 40.3 g/L
at 20 °C.
Acc. to Walker et al. (2008) cobalt
bis(2-ethylhexanoate) has a water solubility of 40.3 g/L at 20.0 °C.
However, the visual findings suggest that the water solubility may be
inversely proportional to temperature.
This observation is supported by a
second experiment (Habeck, 2009), investigating the water solubility at
20 and 37°C. Hence, the water solubilities of cobalt
bis(2-ethylhexanoate) were determined to be 25.05 g /L at 20 °C and 6.30
g/L at 37 °C.
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