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EC number: 849-166-3
CAS number: 83841-00-3
Table 1: Preliminary test sample observations
Mass of test item (g)
Mass of purified water (g)
Actual test concentration (% w/w)
A clear, extremely pale yellow coloured, homogeneous, single phase, non-viscous solution, free from undissolved test item. A faint Tyndall beam was observed in the solution.
A clear, pale yellow coloured, homogeneous, single phase, non-viscous solution, free from undissolved test item. A Tyndall beam was observed in the solution.
A clear, pale brown coloured, homogeneous, single phase, non-viscous solution, free from undissolved test item. A Tyndall beam was observed in the solution.
A pale brown coloured solution, containing undissolved test item.
No liquid phase / solution observed. All water added has been absorbed by the solid test item.
The water solubility of the substance was studied under GLP in
accordance with OECD TG 105, using the flask method. A series of sample
solutions was prepared by dissolving weighed amounts of test substance
in weighed amounts of purified water.
Samples that were immediately soluble were placed in a thermostatically
controlled waterbath set at the test temperature of 20 ± 0.5 °C for at
least 1.25 hours, before the recording of visual observations of
dissolution. All other samples were mechanically shaken at 30 °C for 24
hours, before being placed in a thermostatically controlled waterbath
set at the test temperature of 20 ± 0.5 °C for ca. 2 hours, prior to
recording visual observations of dissolution.The results of the
preliminary test showed that the solubility of the substance was in the
range of 50 to 74.8% w/w at 20 °C. In a definitive test, a substance
aliquot of 5.2205 g was diluted to a total volume of 10 mL using
purified water. The sample was then shaken by hand to mix before placing
in a thermostatically controlled waterbath set at the test temperature
of 20 ± 0.5 °C. After an equlibration period of 3 hours, the sample was
removed and visually observed for dissolution. The pH value of the
sample solution was recorded.
Water solubility >500 g/L at 20 °C and pH of 1.4 (GLP, OECD TG 105,
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