N-(3-{1,1,1,5,5,5-hexamethyl-3-[(trimethylsilyl)oxy]trisiloxan-3-yl}propyl)prop-2-enamide

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-03-29 to 2010-07-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well performed GLP study according to recent OECD technical guidelines.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

adopted July 27, 1995

Deviations:

yes

Remarks:

see "Any other information on material and methods, incl. tables"

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

May 2008

Deviations:

yes

Remarks:

see "Any other information on material and methods, incl. tables"

GLP compliance:

yes (incl. QA statement)

Remarks:

Certificate attached to full study report.

Type of method:

column elution method

Test material

Test material information

Constituent 1

Reference substance name:

N-(3-{1,1,1,5,5,5-hexamethyl-3-[(trimethylsilyl)oxy]trisiloxan-3-yl}propyl)prop-2-enamide

EC Number:

700-253-3

Cas Number:

115258-10-1

Molecular formula:

C15H37NO4Si4

IUPAC Name:

N-(3-{1,1,1,5,5,5-hexamethyl-3-[(trimethylsilyl)oxy]trisiloxan-3-yl}propyl)prop-2-enamide

Results and discussion

Water solubility

Water solubility:

29 µg/L

Temp.:

20 °C

pH:

> 6 - < 7

Any other information on results incl. tables

Method:

The water solubility of the test item was estimated using the column elution method. The saturation mass concentration of the test itemwas determined using a LC-MS/MS-method.

 

Result of the Preliminary Test (non-GLP):

The water solubility of the test item was estimated to be below 10 mg/L.

 

Result of the Main Test:

The saturation concentration of the test item was estimated using LC-MS/MS method.

The linearity of the analytical method was proved in the concentration range from 0.5 to 50 µg test item/L. The regression coefficient (r²) was determined to be 0.9996.

The results of the measurements of the test samples are summarized in Table 1.

Corresponding to the analysis the water solubility of the test item at 20 ± 1 °C was determined to be 29 µg/L.

 

Table 1: Results for the determination of the water solubility of the test item 

Flow rate [mL/min]	Time [h]	Concentration found [µg/L]	Dilution factor	Concentration calculated [µg/L]	Measured pH after incubation
0.4	0	17.883	2	35.766	6-7
0.4	1	16.488	2	32.977	6-7
0.4	2	15.258	2	30.516	6-7
0.4	3	19.483	2	38.965	6-7
0.4	4	19.934	2	39.867	6-7
0.2	0	9.270	2	18.540	6-7
0.2	1	9.721	2	19.442	6-7
0.2	2	11.576	2	23.134	6-7
0.2	3	12.346	2	24.692	6-7
0.2	4	12.264	2	24.528	6-7
mean value (n=10)				28.843
standard deviation (n=10)				7.851

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The water solubility of the test item N-[3-tris(trimethylsilyloxy) silylpropyl]prop-2-enamide was determined to be 29 µg/L at 20 +/-1 °C using the column elution method for the performance of the main test.

Executive summary:

Purpose:

The purpose of the study was to determine the solubility of the test item in water which is specified by the saturation mass concentration of the test item in water at a specified temperature.

 

Results:

The water solubility of the test item was estimated to be smaller than 10 mg/L in a preliminary test (non-GLP). Therefore, the column elution method was used in the main test.

The water solubility of the test item N-[3-tris(trimethylsilyloxy) silylpropyl]prop-2-enamide was determined to be 29 µg/L at20 ± 1 °Cusing the column elution method for the performance of the main test.