Dodecylbenzenesulphonic acid, compound with isopropylamine (1:1)

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:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

Dodecylbenzenesulphonic acid, compound with isopropylamine (1:1)

EC Number:

247-556-2

EC Name:

Dodecylbenzenesulphonic acid, compound with isopropylamine (1:1)

Cas Number:

26264-05-1

Molecular formula:

C18H30O3S.C3H9N

IUPAC Name:

sodium dodecylbenzenesulfonate

Test material form:

liquid

Results and discussion

Surface tension

Surface tension:

33.1 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Any other information on results incl. tables

Surface Tension of the Test Item

Measurement	Time passed after transfer test solution to test vessel [minutes]	Surface tension (mN/m)
		individual	mean	mean multiplied by Φband Harkins-Jordan corrected value
1	17	35.5	33.4^1	33.1
2	18	34.5
3	19	34.2
4	20	34.3
5	21	34.6
6	22	34.1

¹         Mean calculated from measurements 2 to 6, after equilibrium was reached.

Applicant's summary and conclusion

Conclusions:

The OECD harmonized ring method was applied for the determination of the surface tension of the test substance. The surface tension of a test solution at a concentration of 1 g/L at 20°C was 33.1 mN/m. According to this, the test item is considered to be surface active.