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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:
weight of evidence
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:
4.38 g/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
ca. 7.3
Remarks on result:
other: average of data at 24, 48 and 96 h

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.

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 h): 4.17 g/l

test 2 (48 h): 4.78 g/l

test 3 (96 h): 4.19 g/l

Average solubility: 4.38 g/l

Standard deviation: 0.35

pH mother solution: 7.03

pH satured solution: 7.30

Conclusions:
Solubility in water is 4.38 g/l at 20 °C and pH 7.30.
Executive summary:

Method

OECD guideline 105 - shake flask method.

Result

Solubility in water is 4.38 g/l at 20 °C and pH 7.30.

Description of key information

Soluble in water at 20 °C and pH 7.30.

Key value for chemical safety assessment

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

Additional information

OECD guideline 105.