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Diss Factsheets

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:
From June 10 to July 12, 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Well described study conducted in accordance with GLP and OECD Guideline 105 with minor deviation: mean accuracy of the analytical method with frozen samples (112%) slightly above the criterion range (70-110%).
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
mean accuracy on frozen samples (112%) slightly above the criterion range (70-110%)
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
yes
Remarks:
mean accuracy on frozen samples (112%) slightly above the criterion range (70-110%)
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Key result
Water solubility:
2 540 mg/L
Temp.:
20 °C
pH:
>= 4.7 - <= 5
Remarks on result:
other: prolonged stirring times of 95, 119 and 143 hours
Details on results:
Preliminary test: Content of test substance dissolved in water was 2.42 g/L.

Main test: See tables 1 and 2

Table 1: Water solubility of the test substance at 24, 48 and 72 hours

 

Stirring time (hours)

Analysed concentration (g/L)

Mean (g/L)

MD (%)

pH

24

2.52

2.85

24

6

48

2.81

5.9

72

3.21

5.9

 

Table 2: Water solubility of the test substance at prolonged stirring times of 96, 120 and 144 hours

 

Stirring time (hours)

Analysed concentration (g/L)

Mean (g/L)

MD (%)

pH

95

2.77

2.54

14

4.7

119

2.45

4.7

143

2.4

5
Conclusions:
The water solubility of terpineol multiconstituent at 20°C obtained with stirring times of 24, 48 and 72 hours was 2847 mg/L. The pH of the aqueous samples was 5.9-6.0.
Executive summary:

A GLP study was conducted to determine the water solubility of terpineol multiconstituent according to OECD Guideline 105, flask method.

 

The water solubility of terpineol at 20°C obtained with prolonged stirring times of 24, 48 and 72 hours was 2847 mg/L. The pH of the aqueous samples was 5.9 -6.0.

Description of key information

The water solubility of terpineol multiconstituent at 20°C was 2847 mg/L according to OECD Guideline 105.

Key value for chemical safety assessment

Water solubility:
2 847 mg/L
at the temperature of:
20 °C

Additional information

This experimental value was measured in a study performed according to OECD Guideline 105 with minor deviations.