Benzenesulfonic acid, 4-dodecyl-, cerium(4+) salt, basic

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-04-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

2017-02-28

Type of method:

ring method

Specific details on test material used for the study:

Storage Conditions: Room temperature, sealed container

Surface tension:

30.3 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Remarks on result:

other: 90 vol% saturated solution of the test item in double distilled water

Measured surface tension values

Value No.	1^stset of measurements (5 min after preparing the solution) σ [mN/m]	2^ndset of measurements (20 min after preparing the solution) σ [mN/m]
1	30.61	30.08
2	30.58	30.04
3	30.56	30.02
4	30.55	30.00
5	30.55	29.99
6	30.56	29.98
Mean value of the individual values	30.57 ± 0.04	30.02 ± 0.06
Total mean value	30.30 ± 0.32

Note that the result of the first measurement of each set of measurements exceeded the result of the last measurement of the respective set of measurements by 0.05 mN/m to 0.1 mN/m; so the relative decrease of the measured surface tension during one set of measurements was between 0.2 % and 0.3 %. The first measurement of the first set of measurements exceeded the last measurement of the second set of measurements by 0.63 mN/m; hence, the relative difference between the very first and the very last measurement was approx. 2 %.

The test item has a mean surface tension of 30.30 mN/m. Thus, the test item is to be regarded as surface active.

Conclusions:

According to OECD Test Guideline 115 and Regulation EC No. 440/2008 Method A.5. the surface tension at 20 °C of test item benzenesulfonic acid, 4-dodecyl-, cerium(4+) salt, basic was determined to be: σ = 30.3 mN/m
According to Regulation EC No. 440/2008 Method A.5. the test item is to be regarded as surface active material.

Description of key information

According to OECD Test Guideline 115 and Regulation (EC) No. 440/2008 Method A.5. the surface tension at 20 °C of test item benzenesulfonic acid, 4-dodecyl-, cerium(4+) salt, basic was determined to be σ = 30.3 mN/m. The test item is to be regarded as surface active material.

Additional information

The test item (103.48 mg) was dissolved in 100 mL double distilled water and stirred overnight to create an oversaturated solution. Due to the fact that the test item was not dissolved completely, the saturated solution was filtered to clear the solution via an HPLC filter. Subsequently 90 mL of the filtered solution were diluted to 100 mL with double distilled water to create a solution with a concentration of about 90 % of the solubility. The concentration in mg/L of the solution was not determined.