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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
Study period:
26.06. - 24.07.07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Key result
Water solubility:
23.92 mg/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
> 8.83 - < 8.97

 

Sample 1

Sample 2

Sample 3

Equilibration time

72 h

72 h

72 h

Amount/volume

25 mg/10 mL

25 mg/10 mL

25 mg/10 mL

Equilibration temperature

30 °C

30 °C

30 °C

Test temperature

20 °C

20 °C

20 °C

Appearance of the solution

Almost clear

Almost clear

Almost clear

pH value

8.83

8.91

8.88

Result

22.471 mg/L

22.296 mg/L

23.750 mg/L

 

 

Sample 1

Sample 2

Sample 3

Equilibration time

48 h

48 h

48 h

Amount/volume

25.2 mg/10 mL

25 mg/10 mL

25 mg/10 mL

Equilibration temperature

30 °C

30 °C

30 °C

Test temperature

20 °C

20 °C

20 °C

Appearance of the solution

Almost clear

Almost clear

Almost clear

pH value

8.90

8.97

8.92

Result

22.759 mg/L

26.634 mg/L

25.584 mg/L

 

 

Sample 1

Sample 2

Sample 3

Equilibration time

72 h

72 h

72 h

Amount/volume

25.0 mg/10 mL

25.1 mg/10 mL

25.1 mg/10 mL

Equilibration temperature

30 °C

30 °C

30 °C

Test temperature

20 °C

20 °C

20 °C

Appearance of the solution

Almost clear

Almost clear

Almost clear

pH value

8.87

8.87

8.88

Result

22.437 mg/L

24.271 mg/L

22.937 mg/L

 

The water solubility was determined by using the results determined at 72 h and 48 h.

 

72 h

48 h

Result sample 1

22.471 mg/L

22.759 mg/L

Result sample 2

22.296 mg/L

26.634 mg/L

Result sample 3

23.750 mg/L

25.584 mg/L

Mean

22.839 mg/L

24.992 mg/L

Mean (72 h and 48 h)

23.9157 mg/L

Water solubility at 20°C

23.92 mg/L
Conclusions:
The water solubility of the test item at a temperature of 20°C was determined to be 23.92 mg/L
Executive summary:

The water solubility was determined according to EU Method A.6 using the flask method with HPLC analysis after different equilibration times. The water solubility was determined by using the results determined at 72 h and 48 h. The water solubility of the test item at a temperature of 20°C was determined to be 23.92 mg/L

Description of key information

The water solubility of the test item at a temperature of 20°C was determined to be 23.92 mg/L.

Key value for chemical safety assessment

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

Additional information

The water solubility was determined according to EU Method A.6 using the flask method with HPLC analysis after different equilibration times.The water solubility was determined by using the results determined at 72 h and 48 h.The water solubility of the test item at a temperature of 20°C was determined to be 23.92 mg/L