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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:
25 April 2017 - 06 June 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Test method according to EEC method A.6. and OECD Guideline 105. GLP study.
Qualifier:
according to
Guideline:
EU Method A.6 (Water Solubility)
Qualifier:
according to
Guideline:
OECD Guideline 105 (Water Solubility)
GLP compliance:
yes (incl. certificate)
Type of method:
flask method
Key result
Water solubility:
0.52 g/L
Conc. based on:
test mat.
Incubation duration:
72 h
Temp.:
20 °C
pH:
>= 7.09 - <= 7.12
Details on results:
Solubility of the test item at 20 ± 0.5ºC and at pH ranging 7.09–7.12 in water is 0.5203 g/L.

Table 1. Results of the preliminary test

0.1g in x mL of solution

0.1

0.5

1

2

10

100

>100

Soluble (+/-)

-

-

-

-

-

-

+

Approximate solubility, g/L

> 1000

1000 to 200

200 to 100

100 to 50

50 to 10

10 to 1

<1

 x – water of pH 5.6

Table 2. Results of test item solubility in water

Mixing timeat 30 ºC [days, flasks]

1

2

3

Samples

1

2

3

4

5

6

Temperature, ºC

20.3

20.1

20.1

pH

7.09

7.12

7.11

Concentration of ISOBORNEOL, g/kg

0.5307

0.5135

0.5023

0.5008

0.5215

0.5528

Average concentration of ISOBORNEOL,g/kg

0.5221

0.5016

0.5372

Average concentration of ISOBORNEOL, g/kg

0.5203

The solubility of ISOBORNEOL in water is 0.5203 g/kg. The density of this solution is about 1kg/L (about water density). After recalculation:

The solubility of the ISOBORNEOL in water is 0.5203 g/L

Conclusions:
Solubility of isoborneol at 20 ± 0.5ºC and at pH ranging 7.09–7.12 in water is 0.5203 g/L.
Executive summary:

The water solubility test of isoborneol was performed in accordance with EEC method A.6 and OECD 105. About five times the quantity of test item determined in the preliminary test was weighed into each of three glass vessels at 100 ml fitted with glass stoppers. 80 ml of double distilled water was added to each vessel. These closed vessels were agitated in an incubator at 30 ºC with magnetic stirrers. After one day, one of the flask was equilibrated for 24 h at the test temperature 20 ± 0.5 ºC with occasional shaking. The other two flasks were treated similarly after initial equilibration at 30 ºC for two and three days respectively. Two replicates were performed. The samples taken during saturation were then separated using a vial-centrifuge to give the clear liquid phase and the concentration of the test substance in the clear solvent phase was determined by a validated GC method. The solubility of isoborneol in distilled water at pH 7.09 -7.12 was determined to be 0.5203 g/l at 20 ± 0.5 °C.

Description of key information

Key study: Test method EEC A.6 and OECD 105. GLP study. The solubility of isoborneol in distilled water at pH 7.09 -7.12 was determined to be 0.5203 g/l at 20 ± 0.5 °C.

Key value for chemical safety assessment

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

Additional information

Key study: The water solubility test of isoborneol was performed in accordance with EEC method A.6 and OECD 105. About five times the quantity of test item determined in the preliminary test was weighed into each of three glass vessels at 100 ml fitted with glass stoppers. 80 ml of double distilled water was added to each vessel. These closed vessels were agitated in an incubator at 30 ºC with magnetic stirrers. After one day, one of the flask was equilibrated for 24 h at the test temperature 20 ± 0.5 ºC with occasional shaking. The other two flasks were treated similarly after initial equilibration at 30 ºC for two and three days respectively. Two replicates were performed. The samples taken during saturation were then separated using a vial-centrifuge to give the clear liquid phase and the concentration of the test substance in the clear solvent phase was determined by a validated GC method. The solubility of isoborneol in distilled water at pH 7.09 -7.12 was determined to be 0.5203 g/l at 20 ± 0.5 °C.