acrylic acid, 3-(trimethoxysilyl)propyl ester

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

disregarded due to major methodological deficiencies

Study period:

1994-10-14 to 1995-04-27

Reliability:

3 (not reliable)

Rationale for reliability incl. deficiencies:

significant methodological deficiencies

Remarks:

The study is disregarded because significant hydrolysis would have occurred during the study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

With the exception of the following deviation, the experimental procedure used complied with that specified in Method A5 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC):

Deviations:

yes

Remarks:

The surface tension result was not corrected using the Harkins-Jordan correction table as it was not applicable to the instrument used. This deviation has been considered not to have affected the integrity of the study.

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Surface tension:

59.4 mN/m

Temp.:

22 °C

Conc.:

1.01 g/L

Results

Calibration

Reading (mN/m)	Temperature (°C)	Literature value (mN/m)	Calibration factor
72.3	22	72.44	1.002
72.4	22	72.44	1.001
72.4	22	72.44	1.001
72.3	22	72.44	1.002

 

Mean calibration factor = 1.002

Sample solution

Time (mins)	Reading (mN/m)	Temperature (°C)
218	59.2	22
231	59.1	22
241	59.6	22
250	59.2	22

 

Mean reading = 59.3 mN/m

Surface tension = reading x calibration factor = 59.3 x 1.002 = 59.4 mN/m

Conclusion

The surface tension of a 1.01 g/L solution of the test substance has been determined to be 59.4 mN/m at 22.0± 0.5°C.

Conclusions:

The surface tension of a 1.01 g/L solution of 3-(trimethoxysilyl)propyl acrylate was determined to be 59.4 mN/m at 22.0 ± 0.5°C. However, significant hydrolysis would have occurred during the study. Therefore, the study is disregarded.

Description of key information

Surface tension: waived because based on structure, surface activity is not expected

Additional information

The surface tension of a 1.01 g/L aqueous solution of the registered substance was determined to be 59.4 mN/m at 22.0 ± 0.5°C measured in accordance with EU Method A.5 and in compliance with GLP. Under the conditions of the study, the substance is considered slightly surface active. However, this study has been disregarded because significant hydrolysis would have occurred during the study. Furthermore, based on chemical structure, the substance is not expected to be surface active and surface activity is not a desired property of the material.