Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

other: Expert statement supported by experimental data

Adequacy of study:

key study

Study period:

19 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well documented expert statement supported by experimental data

Data source

Reference

Reference Type:

other: expert statement

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

1995

Deviations:

not applicable

Remarks:

not applicable for expert statement

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

Regulation (EC) No 440/2008

Deviations:

not applicable

Remarks:

not applicable for expert statement

Principles of method if other than guideline:

A study according to OECD guideline 105 was initiated. However, based on the preliminary results, a determination of the water solubility of the test item according to TG OECD 105 is not possible, because its water solubility is too high for the approach given by the guideline. Therefore an expert statement was prepared.

Other quality assurance:

ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)

Type of method:

flask method

Test material

Test material information

Constituent 1

Reference substance name:

Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts

EC Number:

275-085-2

EC Name:

Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts

Cas Number:

70983-43-6

Molecular formula:

see structural formula below, for n=4 C13H24N2O3 HO.Na

IUPAC Name:

Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts

Test material form:

liquid

Remarks:

oily liquid

Details on test material:

Batch No.: 54542L16
Storage at room temperature, protected from light.

Results and discussion

Water solubility

Key result

Water solubility:

> 1 000 g/L

Conc. based on:

test mat.

Remarks on result:

completely miscible

Remarks:

Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts” (CAS no. 70983-43-6) is miscible with water in a test item weight to water volume ratio of at least 10:1 at room temperature.

Details on results:

Preliminary test
The preliminary test indicated a water solubility of >1.000 g/L, as 0.1 g were completely dissolved in 0.1 mL of ultra-pure water.

Main test
Based on the results of the preliminary test, a determination of the water solubility of the test item “Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts according to TG OECD 105 is not possible, because its water solubility is too high for this approach.

Any other information on results incl. tables

The preliminary test according to TG OECD 105 showed that the test item was very soluble in water, as ca. 0.1 g could be readily dissolved in 0.1 ml of ultra-pure water. Based on the testing scheme provided in the guideline and given in the table below, this corresponds to a water solubility of >1000 g/l.

Testing scheme to determine the approximate water solubility in the preliminary test:

mL of water for 0.1 g test item	0.1	0.5	1	2	10	100	>100
Approx. solubility in g/L	>1000	1000 to 200	200 to 100	100 to 50	50 to 10	10 to 1	<1

This result was further confirmed by an additional test, which illustrated that addition of 0.1, 0.5, 1 and 10 ml of ultra-pure water to about 1 g of test item resulted in a clear solution in all cases. This demonstrates that “Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts” (CAS no. 70983-43-6) is miscible with water in a test item weight to water volume ratio of at least 10:1.

Applicant's summary and conclusion

Conclusions:

The substance “Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts” (CAS no. 70983-43-6) is miscible with water in a test item weight to water volume ratio of at least 10:1 at room temperature as demonstrated in a preliminary test according to OECD 105.

Executive summary:

It was the aim of this study to determine the water solubility of the test item “Imidazolium compounds, 2-C4-8-alkyl-1-(2-carboxyethyl)-4,5-dihydro-3-(hydroxyethyl), hydroxides, sodium salts“ (CAS no. 70983-43-6) according TG OECD 105.

The preliminary test according to the guideline showed that the test item was very soluble in water, as about 0.1 g could be readily dissolved in 0.1 ml of ultra-pure water corresponding to a water solubility of >1000 g/L.

This result was further confirmed by an additional test, which illustrated that addition of 0.1, 0.5, 1 and 10 mL of ultra-pure water to about 1 g of test item resulted in a clear solution in all cases. This demonstrates that the test item is miscible with water in a test item weight to water volume ratio of at least 10:1.

Based on these results, a determination of the water solubility of the test item according to TG OECD 105 is not possible, because its water solubility is too high for the approach given by the guideline.