Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
The study was conducted between 21 October 2014 and 4 December 2014.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Details on test material:
Identification: Isobutyl Phenyl Acetate
Chemical nature: 2-methylpropyl 2-phenylacetate
EC No.: 203-007-9
CAS No.: 102-13-6
Molecular weight: 192.2 g/mol
Appearance/physical description: clear, colourless liquid
Empirical formula: C12H16O2
Batch No: SC00010162
Purity: 100%

Results and discussion

Surface tension
Surface tension:
57.2 mN/m
Temp.:
20.5 °C
Conc.:
90 other: % of saturation concentration

Any other information on results incl. tables

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

Sample A

Time (mins)

Reading (mN/m)

Temperature (°C)

95

56.5

21.0

120

56.5

20.6

130

56.5

20.6

145

57.0

20.6

155

57.0

20.4

Sample B

Time (mins)

Reading (mN/m)

Temperature (°C)

170

57.0

20.4

180

57.5

20.4

190

57.5

20.4

200

57.5

20.4

210

57.5

20.4

Mean Sample A result: 56.7 mN/m; pH of Sample A: 5.3

Mean Sample B result: 57.4 mN/m; pH of Sample B: 5.7

Overall result: 57.2 ±0.5 mN/m

Overall temperature: 20.5 ±0.5 ºC

Discussion: A platinum ring with a reduced circumference of 4 cm was used, whereas the guidelines specify 6 cm. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required reading accuracy (± 0.5 mN/m). This procedure with respect to the reduced ring dimensions has been considered not to have affected the integrity of the test.

 

According to criteria mentioned in Method A5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

Applicant's summary and conclusion

Conclusions:
The mean surface tension of duplicate 90 % saturated solutions of test item in water has been determined to be 57.2 mN/m at 20.5 ± 0.5 °C. The test item was considered to be surface-active.
Executive summary:

The surface tension is 57.2 mN/m (90 % saturated solution) at 20.5 ± 0.5 °C, using a ring method, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered to be surface-active.