1,6-Octadien-3-ol, 3,7-dimethyl-, acid-isomerized

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

29 April - 04 July, 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Water solubility:

ca. 0.078 g/L

Conc. based on:

test mat. (dissolved fraction)

Remarks:

cyclic monoterpene ether

Loading of aqueous phase:

100 mg/L

Temp.:

20 °C

pH:

7

Water solubility:

ca. 0.54 g/L

Conc. based on:

test mat. (dissolved fraction)

Remarks:

cyclic monoterpene ether

Loading of aqueous phase:

1 000 mg/L

Temp.:

20 °C

pH:

7

Water solubility:

ca. 2.42 mg/L

Conc. based on:

test mat. (dissolved fraction)

Remarks:

unsaturated monoterpene hydrocarbon

Loading of aqueous phase:

100 mg/L

Temp.:

20 °C

pH:

7

Water solubility:

ca. 3.25 mg/L

Conc. based on:

test mat. (dissolved fraction)

Remarks:

unsaturated monoterpene hydrocarbon

Loading of aqueous phase:

1 000 mg/L

Temp.:

20 °C

pH:

7

Water solubility:

ca. 19.4 mg/L

Conc. based on:

test mat. (total fraction)

Loading of aqueous phase:

100 mg/L

Temp.:

20 °C

pH:

7

Water solubility:

ca. 0.12 - 0.248 g/L

Conc. based on:

test mat. (total fraction)

Loading of aqueous phase:

1 000 mg/L

Temp.:

20 °C

pH:

7

Details on results:

Please refer to information below

The water solubility of Lime Oxide has been determined at 20.0 ± 0.5 °C. Three individual quantifications were performed for the resulting solutions, analyzing the two dominant chemical classes present in the test item (total cyclic monoterpene ethers and total unsaturated monoterpene hydrocarbons), as well as the total dissolved organic carbon content concentration. In addition, due to the composition of the test item, the effect of the initial nominal loading rate was investigated with respect to its influence on the final concentration and composition of the sample solutions.

Nominal Saturation Loading Rate (mg/L)	Mean Total Cyclic Monoterpene Ether Concentration (g/L)	Mean Total Unsaturated Monoterpene Hydrocarbon Concentration (g/L)	Mean/Overall Total Organic Carbon Concentration (g/L)
100	7.83 x 10^-2	2.42 x 10^-3	1.94 x 10^-2
1000	0.540	3.25 x 10^-3	Range of 0.120 to 0.248 observed, correlating with an increased initial saturation period.

Conclusions:

The water solubility of Lime Oxide has been determined at 20.0 ± 0.5 °C.
At the nominal saturation loading rate of 100 mg/l, mean total cyclic monoterpene ether concentration was 7.83 x 10-2g/l, mean total unsaturated monoterpene hydrocarbon concentration was 2.42 x 10-3 g/l and mean/overall total organic carbon concentration was 1.94 x 10-2 g/l.
At the nominal saturation loading rate of 1000 mg/l, mean total cyclic monoterpene ether concentration was 0.540g/l, mean total unsaturated monoterpene hydrocarbon concentration was 3.25 x 10-3g/l and mean/overall total organic carbon concentration was in a range of 0.120 to 0.248 observed, correlating with an increased initial saturation period.

Executive summary:

The water solubility of Lime Oxide has been determined at 20.0 ± 0.5 °C employing a flask method, designed to be compatible with Method A6 and OECD 105. Three individual quantifications were performed for the resulting solutions, analyzing the two dominant chemical classes present in the test item (total cyclic monoterpene ethers and total unsaturated monoterpene hydrocarbons), as well as the total dissolved organic carbon content concentration. In addition, due to the composition of the test item, the effect of the initial nominal loading rate was investigated with respect to its influence on the final concentration and composition of the sample solutions.

Nominal Saturation Loading Rate (mg/L)	Mean Total Cyclic Monoterpene Ether Concentration (g/L)	Mean Total Unsaturated Monoterpene Hydrocarbon Concentration (g/L)	Mean/Overall Total Organic Carbon Concentration (g/L)
100	7.83 x 10^-2	2.42 x 10^-3	1.94 x 10^-2
1000	0.540	3.25 x 10^-3	Range of 0.120 to 0.248 observed, correlating with an increased initial saturation period.

Description of key information

For the purpose of environmental exposure assessment, a water solubility of 3.25 mg/L has been assigned to the assessment entity "unsaturated monoterpene hydrocarbons". This is the highest value obtained for this group of components in an experimental study performed on the registered substance in which chemical specific analysis was performed for the different types of components present.

Key value for chemical safety assessment

Water solubility:

3.25 mg/L

at the temperature of:

20 °C

Additional information

The water solubility of Lime Oxide has been determined at 20.0 ± 0.5 °C. Three individual quantifications were performed for the resulting solutions, analyzing the two dominant chemical classes present in the test item (total cyclic monoterpene ethers and total unsaturated monoterpene hydrocarbons), as well as the total dissolved organic carbon content concentration. Due to the multi-component composition of the test item, the effect of the initial saturation loading rate on the resulting solubility characteristics was also investigated. The results for the unsaturated monoterpene hydrocarbon group of components are:

Water solubility at loading rate of 100 mg/L is 2.42 mg/L

Water solubility at loading rate of 1000 mg/L is 3.25 mg/L