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EC number: 285-998-8
CAS number: 85186-15-8
samples and extract were first measured in the range 190 / 800 nm, so as
to choose the right wavelength for quantitative measurements. Since the
absorbance of the test solution was proportional to the concentration in
the UV and visible spectra (fig. 1), the preliminary test result was
considered for the final result calculations. The
wavelength chosen was λ= 511.50 nm.
solutions were measured in the spectrophotometer in quantitative mode,
thus generating a calibration curve (fig 2). The calibration curve was
smooth and linear at every concentration. Considering that the
preliminary test resulted in an absorbance of the same shape like the
references, its value was considered for the 24 hours’ measurement (test
1). The following results were obtained after adjusting concentrations
in proportion to the real weights:
Test 1 (24 hrs)
Test 2 (48 hrs)
Test 3 (96 hrs)
pH mother solution
pH saturated solution
substance was tested for water solubility according to OECD guideline
105: Water solubility. The water solubility of the test substance is
22.96 g/l at 20 °C and pH 7.66
Water solubility = 22.96 g/l
The water solubility of the test substance
is 22.96 g/l at 20 °C and pH 7.66, as determined by the flask method
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