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Physical & Chemical properties

Water solubility

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Administrative data

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
GLP compliance:
no
Type of method:
flask method
Water solubility:
39.25 g/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
ca. 7.71
Details on results:
Preliminary solubility result
Reference samples and extract were first measured in the range 190 / 800 nm, so as to choose the right wavelength for quantitative measurements.
Since absorbance of the test solution kept the same proportions along the UV and visible spectra, preliminary test result was considered for the final result calculations. Wavelength chosen was 415 nm.

Test results
Reference solutions were measured in the spectrophotometer in quantitative mode, thus generating a calibration curve. Calibration curve was smooth and linear at every concentration. Considering that preliminary test resulted in an absorbance keeping the same shape like the references, its value was considered for the 24 hours’ measurement (test 1). Adjusting concentrations in proportion to the real weights the following results were obtained:
Test 1 (24 hs) 37.29 g/l
Test 2 (48 hs) 37.14 g/l
Test 3 (96 hs) 43.30 g/l
Average solubility 39.25 g/l
Standard deviation 3.51
pH mother solution 6.77
pH satured solution 7.71
Conclusions:
The substance according to guideline OECD 105.
Solubility in water is 39.25 g/l at 20 °C and pH 7.71.
Executive summary:

Method

OECD guideline 105 - shake flask method.

Result

Solubility in water is 39.25 g/l at 20 °C and pH 7.71.

Description of key information

OECD 105, Solubity in water is 39.25 g/l at 20 °C and pH 7.71.

Key value for chemical safety assessment

Water solubility:
39.25 g/L
at the temperature of:
20 °C

Additional information

OECD guideline 105.