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Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 12th of April, 2016 to 9th of May, 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 105 (Water Solubility)
Version / remarks:
OECD Guidelines for the Testing of Chemicals, Method No. 105, adopted 27. Jul. 1995: “Water Solubility"
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
Council Regulation (EC) No 440/2008 of 31. May 2008, Method A.6: “Water solubility” (last updated by Reg. 260/2014)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
flask method
Key result
Water solubility:
59.36 mg/L
Conc. based on:
test mat.
Loading of aqueous phase:
1 g/L
Incubation duration:
5 d
Temp.:
20 °C
pH:
6
Key result
Water solubility:
0.059 kg/m³
Conc. based on:
test mat.
Loading of aqueous phase:
1 g/L
Incubation duration:
5 d
Temp.:
20 °C
pH:
6
Details on results:
Findings and Results:
The solubility of the test item Sandalmysore Core in water was determined by measurement of the test item concentration in the centrifuged test solutions using HPLC-UV.
The solubility of the test item was estimated to be < 1 g/L in the solubility pre-test. According to the guideline, the flask method was used for the determination of the solubility of the test item in water.
A first experiment was not evaluable due to technical issues with the HPLC determination. However it indicated that the solubility is < 100 mg/L and not dependent on nominal load, therefore the loading rate 1 g/L was chosen for all flasks in experiment 2. Equilibrium was reached after 5 d.
No Tyndall effect (i.e. a laser beam was not scattered when transmitted through the liquid) could be observed indicating that no colloidal dispersed particles were present in centrifuged solutions.
At the plateau, the concentration of Sandalmysore Core in water had reached:
59.36 ± 3.29 mg/L at 20.0 ± 0.1 °C
5.936 ± 0.329 * 10-2 kg/m3 (SI units)
(mean value ± standard deviation of five independent determinations in five individual vessels)
Conclusions:
Concentration of the test item in water:
59.36 ± 3.29 mg/L at 20.0 ± 0.1 °C
= 5.936 ± 0.329 * 10-2kg/m3 (SI units)
(mean value ± standard deviation of five independent determinations in five individual vessels)
Executive summary:

The solubility of the test item in water was determined by measurement of the test item concentration in the centrifuged test solutions using HPLC-UV according to OECD 105 resp. EU A.6

The solubility of the test item was estimated to be < 1 g/L in the solubility pre-test. According to the guideline, the flask method was used for the determination of the solubility of the test item in water.

 

A first experiment was not evaluable due to technical issues with the HPLC determination. However it indicated that the solubility is < 100 mg/L and not dependent on nominal load, therefore the loading rate 1 g/L was chosen for all flasks in experiment 2. Equilibrium was reached after 5 d.

No Tyndall effect (i.e. a laser beam was not scattered when transmitted through the liquid) could be observed indicating that no colloidal dispersed particles were present in centrifuged solutions.

 

At the plateau, the concentration of the test item in water reached

59.36 ± 3.29 mg/L at 20.0 ± 0.1 °C = 5.936 ± 0.329 * 10-2kg/m3 (SI units)

(mean value ± standard deviation of five independent determinations in five individual vessels)

Description of key information

The solubility of the test item in water was determined by measurement of the test item concentration in the centrifuged test solutions using HPLC-UV according to OECD 105 resp. EU A.6

The solubility of the test item was estimated to be < 1 g/L in the solubility pre-test. According to the guideline, the flask method was used for the determination of the solubility of the test item in water.

 

A first experiment was not evaluable due to technical issues with the HPLC determination. However it indicated that the solubility is < 100 mg/L and not dependent on nominal load, therefore the loading rate 1 g/L was chosen for all flasks in experiment 2. Equilibrium was reached after 5 d.

No Tyndall effect (i.e. a laser beam was not scattered when transmitted through the liquid) could be observed indicating that no colloidal dispersed particles were present in centrifuged solutions.

 

At the plateau, the concentration of the test item in water reached

59.36 ± 3.29 mg/L at 20.0 ± 0.1 °C = 5.936 ± 0.329 * 10-2 kg/m3 (SI units)

(mean value ± standard deviation of five independent determinations in five individual vessels)

Key value for chemical safety assessment

Water solubility:
59.36 mg/L
at the temperature of:
20 °C

Additional information