Fatty acids, C16-18 and C18-unsatd., branched and linear, reaction products with diethanolamine

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

key study

Study period:

Experimental Starting Date: 23 April 2012 Experimental Completion Date: 01 June 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Principles of method if other than guideline:

The water solubility was calculated using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency.

GLP compliance:

yes

Type of method:

flask method

Test material

Test material information

Constituent 1

Reference substance name:

Isostearamide DEA

IUPAC Name:

Isostearamide DEA

Details on test material:

Identification: Isostearamide DEA
Description: Amber colored liquid
Batch: OE11124 (6/202593/00)
Purity: 100 %
Expiry / Retest Date: Not supplied
Storage Conditions: Room temperature in the dark

Results and discussion

Water solubility

Water solubility:

0 g/L

Temp.:

25 °C

Remarks on result:

other: Using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency, the water solubility was calculated to be 5.5 x 10-5 g/L at 25 °C.

Details on results:

The results indicated that the test item forms stable emulsions in water, and therefore, its water availability is loading rate dependent. Attempts were made to clean up the samples using centrifugation and filtration; however, the attempts were unsuccessful. The findings indicated that a limit of (self-) emulsifying potential was attained between 50.1 and 75.1 % w/w.

Using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency, the water solubility was calculated to be 5.5 x 10-5 g/L at 25 °C.

Any other information on results incl. tables

Results

Preliminary Test

The loading rate, observations recorded following equilibration and the pH for each solution are shown in the following table:

Table 3.10

 

Sample Number	Loading Rate (% w/w)	Observations	Solution pH
P1	0.108	Clear, colourless liquid with excess test item present.	6.5
P2	1.02	White, opaque liquid with excess test item present.	8.4

 

Overall result: Attempts were made to clean up the samples using centrifugation and filtration. However, the attempts were unsuccessful. Therefore, it was concluded that the test item forms stable emulsions in water, and thus, the “water solubility” would be loading rate dependent.

     

Definitive Test

The loading rate, observations recorded following equilibration and the pH for each solution are shown in the following table:

Table 3.11

 

Sample Number	Loading Rate (% w/w)	Observations	Solution pH
1	10.5	Approximately 5 % excess visible test item separate from a white, opaque, non-viscous liquid.	7.5
2	24.9	Approximately 15 % excess visible test item separate from a creamy, opaque, non-viscous liquid.	9.0
3	50.1	Creamy liquid, non-viscous, uniform emulsion with no excess test item visible.	8.8
4	75.1	Approximately 60 % excess visible test item separate from a creamy, opaque, non-viscous liquid.	*
5	88.8	Amber coloured, slightly viscous liquid.	*

*Not possible, due to the nature of the sample.

Overall results: The results of the preliminary and definitive tests indicate that the test item forms stable emulsions in water, and therefore, the “water solubility” is loading rate dependent.

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The results indicated that the test item forms stable emulsions in water, and therefore, its water availability is loading rate dependent. Attempts were made to clean up the samples using centrifugation and filtration; however, the attempts were unsuccessful. The findings indicated that a limit of (self-) emulsifying potential was attained between 50.1 and 75.1 % w/w.

Using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency, the water solubility was calculated to be 5.5 x 10-5 g/L at 25 °C.

Executive summary:

The determination was carried out by visual assessment, using a flask method, based on Method A6 Water Solubility of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 105 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

 

Additionally, the water solubility was calculated using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency.

Discussion

The standard EC A6/ OECD 105 procedures were not applicable to this test item due to the high indeterminable saturation levels produced. It was therefore not possible to prepare samples at five times the saturation level as recommended in the guideline. No analysis could be performed due to the high solubility producing unfilterable mixtures and thus the water solubility was estimated based on visual inspection.

 

As the test item was noted to form stable emulsions in water (as opposed to true solutions), it was considered that evaluation of emulsification potential at differing loading rates would be more meaningful with respect to environmental effect.

       

Conclusion

The results indicated that the test item forms stable emulsions in water, and therefore, its water availability is loading rate dependent. Attempts were made to clean up the samples using centrifugation and filtration; however, the attempts were unsuccessful. The findings indicated that a limit of (self-) emulsifying potential was attained between 50.1 and 75.1 % w/w.

 

Using WSKOW v1.42 (Sept 2010), © 2000 U.S. Environmental Protection Agency, the water solubility was calculated to be 5.5 x 10^-5g/L at 25°C.