Registration Dossier

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Study initiation 09.10.2017, experimental: 23-25.10.2017, Final report: 21.22.2018
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 guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Other quality assurance:
other: Quality Assurance Unit in accordance with the OECD principles of GLP and respective national regulations

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Details on test material:
colourless
Specific details on test material used for the study:
Batch number 423/040917. Sample No. SAMP_281. EAS Test item code M-00013852,

Results and discussion

Surface tension
Surface tension:
38.9 mN/m
Temp.:
20.1 °C
Conc.:
90 other: % of the saturation solubility. Since the saturation solubility was below 1 g/L a concentration of 90 % of the saturation solubility was used in the test

Any other information on results incl. tables

Calibration

A measuring vessel was filled with ultra-pure water which was equilibrated to the test temperature and the measurement of surface tension was started immediately. The determined mean surface tension of water is given in Table 1.

The nominal surface tension of water is equal to 72.75 mN/m at 20 °C. The result of the calibration is given in Table 1.

Table 1:        Calibration data

Nominal surface tension of
ultra-pure water at 20 °C
[mN/m]

Determined mean surface
tension of ultra-pure water
[mN/m]

Calibration factor

ebb

72.75

71.2

1.0218

 

Since the determined surface tension of water is nearly equal to the nominal value of water the apparatus worked accurately and was fit for purpose.

Measurement of the Surface Tension

A measuring vessel was filled with test item dilution which was equilibrated to the test temperature and the measurement of the surface tension was started immediately.

The results of surface tension determinations of Phenol, 4-nonyl-, branched are given in Table 2 to Table 4.

Table 2:     Surface tension of Phenol, 4-nonyl-, branched (Test No. 1)

No.

Time

[s]

Temperature

[°C]

Surface Tension
(measured)

[mNlm]

1

442

20.2

38.4

2

521

20.1

38.3

3

600

20.1

38.3

4

680

20.1

38.4

5

761

20.0

38.4

Mean:

 

20.1

38.4

SD

 

0.1                     0.1

 

Age of solution [h]

25.3

 

SD: Standard Deviation

Table 3:     Surface tension of Phenol, 4-nonyl-, branched (Test No. 2)

No.

Time

[s]

Temperature

[°C]

Surface Tension
(measured)

[mN/m]

1

176

20.0

37.8

2

254

20.1

37.8

3

334

20.0

37.8

4

412

20.0

37.8

5

494

20.2

37.8

Mean:

 

20.1

37.8

SD

 

0.1                     0.0

 

Age of solution [h]

25.2

 

SD: Standard Deviation

Table 4:     Surface tension of Phenol, 4-nony branched

Test No.

Mean

temperature

[°C]

Mean Surface
Tension
(measured)

[mNlm]

(Db-corrected
Mean Surface
Tension

[mNlm]

Age of solution

[h]

1

20.1

37.8

38.6

25.3

2

20.1

38.4

39.2

25.2

Mean:

20.1

38.1

38.9

25.3

AD:

0.0

0.6

0.6

0.1

 

AD: Absolute Deviation

Applicant's summary and conclusion

Conclusions:
The mean of two determinations of the surface tension of Para Nonylphenol was determined to be 38.9 mN/m at 20.1 °C. The test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.
Executive summary:

The aim of the study was the determination of the surface tension of Phenol, 4-nonyl-, branched at 20 °C ± 0.5 °C according to EC method A.5 and OECD 115.

Since the saturation solubility was below 1 g/L a concentration of 90 % of the saturation solubility was used in the test. The test solution has been generated by dilution of a saturated solution of the test item in water.

The mean of two determinations of the surface tension of Para Nonylphenol was determined to be 38.9 mN/m at 20.1 °C.

Since the test item showed a surface tension lower than 60 mN/m under the conditions of this method the test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.