Benzenesulfonic acid, mono- and dialkylation products with C16-20 (even numbered, branched and linear) olefins, calcium salts, calcium carbonate, overbased, including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalytic dewaxed, light or heavy paraffinic C15-C50

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was carried out between 26 August 2010 and 27 October 2010.

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:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

yes

Remarks:

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

Test guideline 2

Qualifier:

according 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.
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

Test material

Test material information

Constituent 1

Reference substance name:

X-12764

IUPAC Name:

X-12764

Details on test material:

Sponsor's identification: X-12764
Description : Dark brown viscous liquid
Purity : approx. 50% w/w in mineral oil
Batch/Lot number: not supplied
Date received: 10 August 2010
Storage conditions: Room temperature in the dark
Expiry date : 06 August 2016

Results and discussion

Surface tension

Surface tension:

68 mN/m

Temp.:

21.4 °C

Conc.:

0 g/L

Remarks on result:

other: The surface tension of a 2.1 x 10-4 g/l solution of test item has been determined to be 68.0 mN/m, at 21.4 ± 0.5°C. Consequently, the test item is considered not to be a surface-active item.

Any other information on results incl. tables

Results

Sample solution concentration

The mean peak areas relating to the standard and sample solutions are shown in the following table:

Table 7.2

Solution	MeanArea*
Standard 4.00 mg/l	8.260 x 10^5
Standard 3.00 mg/l	6.785 x 10^5
Standard 2.00 mg/l	6.339 x 10^5
Standard 2.07 mg/l	7.003 x 10^5
Standard 1.00 mg/l	4.280 x 10^5
Standard 0.501 mg/l	3.608 x 10^5
Sample A	8.536 x 10^4
Sample B	6.095 x 10^4
Standard 2.00 mg/l	7.026 x 10^5
Standard 2.07 mg/l	6.683 x 10^5
Mean sample solution concentration = 2.1 x 10^-4g/l

*corrected for matrix blank

The calibration curve from which the sample concentrations were interpolated is shown in attachment "A5calcurve".

Calibration factor (f)

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

Table 7.3

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
73.0	22.4	72.35	0.991
73.0	22.4	72.35	0.991
73.0	22.4	72.35	0.991
73.0	22.4	72.35	0.991
73.0	22.2	72.38	0.992
73.0	22.2	72.38	0.992
73.0	22.2	72.38	0.992
73.0	22.2	72.38	0.992
73.0	22.2	72.38	0.992
Mean Calibration Factor = 0.992 (last six readings)

Sample solution readings

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

Table 7.4

Time (mins)	Reading (mN/m)	Temperature (ºC)
70	66.0	22.4
81	66.5	22.4
89	67.0	22.4
97	68.5	22.4
112	68.5	22.2
121	68.5	22.2
126	68.5	22.2
131	68.5	22.2

Mean reading                 :   68.5 mN/m (last five readings)
Surface tension              = reading x calibration factor
                                         = 68.5 x 0.992
                                         = 68.0 mN/m
Temperature                   :   22.2 ± 0.5ºC
pH of sample solution    :   7.0

Applicant's summary and conclusion

Conclusions:

The surface tension of a 2.1 x 10-4 g/l solution of test item has been determined to be 68.0 mN/m, at 21.4 ± 0.5°C. Consequently, the test item is considered not to be a surface-active item.

Executive summary:

Method

The determination was carried out using a White Electrical Institute interfacial tension balance and a procedure based on the ISO 304 ringthod. With the exception of the following deviation, the experintal procedure used was designed to be compatible with those specified in Method A5 Surface Tension ofCommissionRegulation (EC) No 440/2008 of 30 May 2008 and 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 2.1 x 10^-4 g/l solution of test item has been determined to be 68.0 mN/m, at 21.4 ± 0.5°C. Consequently, the test item is considered not to be a surface-active item.