alpha-[butyl(dimethylsilyl)]-omega-[3-(2-{[2- (methacryloyloxy)ethyl]carbamoyloxy}ethoxy) propyl]poly[oxy(dimethyl)silylene]

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 30 June 2011 and 01 July 2011.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

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. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2011

Report date:

2011

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

yes

Remarks:

The surface tension result was not corrected using the Harkins-Jordan correction table

Principles of method if other than guideline:

The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used.
Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m); this is as a result of the reduced ring dimensions.

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Test material

Test material information

Test material form:

liquid

Results and discussion

Surface tension

Surface tension:

69.6 mN/m

Temp.:

22.2 °C

Remarks on result:

other: The Sponsor provided a calculated water solubility for the test item of 0.0000689 mg/l.

Any other information on results incl. tables

Results

Calibration factor (f)

The readings, temperatures and the corresponding calibration factors for glass double-distilled water are shown in the following table:

Table 5.2

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.5	22.2	72.379	0.998
72.5	22.2	72.379	0.998
72.5	22.2	72.379	0.998
73.0	22.2	72.379	0.991
72.5	22.2	72.379	0.998
72.5	22.2	72.379	0.998
Mean Calibration Factor = 0.997

Sample solution readings

The readings, times and temperatures for the sample solution are shown in the following table:

Table 5.3

Time (mins)	Reading (mN/m)	Temperature (ºC)
110	69.5	22.2
123	69.5	22.2
135	70.0	22.2
149	70.0	22.2
164	70.0	22.2

Mean reading                :   69.8 mN/m
Surface tension            =  reading x calibration factor
                                    =  69.8 x 0.997
                                    =  69.6 mN/m
Temperature                 :   22.2 ± 0.5ºC
pH of sample solution   :   6.26

Applicant's summary and conclusion

Conclusions:

The surface tension of a 90% saturated solution of test item in water has been determined to be 69.6 mN/m at 22.2 ± 0.5°C.

Executive summary:

INTRODUCTION

The relative density and surface tension of the test item have been determined.

Methods employed are designed to be compatible with those specified in the current OECD Guidelines for Testing of Chemicals.

Method

The determination was carried out using a White Electrical Institute Co. Ltd. torsion balance for surface and interfacial tension measurements and a procedure based on the ISO 304 ring method. With the exception of the following deviation, the experimental procedure used was designed to be compatible with that specified in Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.

The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m); this is as a result of the reduced ring dimensions.

This deviation has been considered not to have affected the integrity of the study.

Conclusion

The surface tension of a 90% saturated solution of test item in water has been determined to be 69.6 mN/m at 22.2 ± 0.5°C.