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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
GLP compliance:
no
Type of method:
flask method
Water solubility:
ca. 34.3 g/L
Temp.:
20 °C
Remarks on result:
other: Standard deviation: 0.65

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 results calculations.

Wavelength chosen was λ = 531.50 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, making a new determination after 48 hs.

Adjusting concentrations in proportion to the real weights the following results were obtained:

Final test (24 hs): 33.84 g/l

Final test (48 hs): 34.76 g/l

Average solubility: 34.30 g/l

Standard deviation: 0.65

Conclusions:
Water solubility: 34.30 g/l
very soluble (> 10000 mg/L)
Executive summary:

Method

Solubility was performed following the recommendations of the OECD method 105.

Result

The sample shows a water solubility of 34.3 g/l at 20 °C.

Description of key information

34.3 g/l at 20 °C

Key value for chemical safety assessment

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

Additional information

Shake Flask method - OECD 105