ε-Caprolactone, oligomers, esters with acrylic acid and 2,2,2',2'-tetrakis (hydroxymethyl)-3,3'-oxydipropan-1-ol

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Test guideline 2

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

1995

GLP compliance:

yes (incl. QA statement)

Remarks:

MHRA

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

ε-Caprolactone, oligomers, esters with acrylic acid and 2,2,2',2'-tetrakis (hydroxymethyl)-3,3'-oxydipropan-1-ol

EC Number:

500-276-7

EC Name:

ε-Caprolactone, oligomers, esters with acrylic acid and 2,2,2',2'-tetrakis (hydroxymethyl)-3,3'-oxydipropan-1-ol

Cas Number:

89800-10-2

Molecular formula:

{(C10H16O7).(C3H3O)b.[(C6H10O2)m.(C3H3O)a]} (i.e., UVCB substance)

IUPAC Name:

ε-Caprolactone, oligomers, esters with acrylic acid and 2,2,2',2'-tetrakis (hydroxymethyl)-3,3'-oxydipropan-1-ol

Test material form:

liquid

Details on test material:

Colorless to light yellow

Results and discussion

Surface tension

Key result

Surface tension:

58.6 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Any other information on results incl. tables

The readings, times and temperatures for the sample solutions are shown in the following tables:

SAMPLE 1
Age of Solution (min)	Reading (mN/m)	Temperature (°C)
86	57.0	20.0
104	57.5	20.0
121	57.0	20.0
134	58.5	20.0
147	58.5	20.0
164	58.5	20.0
176	59.0	20.0
189	58.5	20.0

SAMPLE 2
Age of Solution (min)	Reading (mN/m)	Temperature (°C)
200	58.0	20.0
211	58.5	20.0
225	58.5	20.0
238	58.5	20.0
250	59.0	20.0

Mean Sample 1 result: 58.6 mN/m (last 5 values)

pH of Sample 1: 6.3

Mean Sample 2 result: 58.5 mN/m

pH of Sample 2: 6.3

Mean result: 58.6 mN/m

Overall temperature: 20.0 ± 0.5 ºC

Discussion

On removal from the 20 °C equilibration, the samples were clear, colorless solutions with undissolved test item at the bottom of the flasks. After centrifugation, the samples were clear, colorless solutions that were free from undissolved test item.

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface-active.

Conclusion

The surface tension of 90% saturated solutions of test item in water has been determined to be 58.6 mN/m at 20.0 ± 0.5 °C. The test item was considered to be surface-active.