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Physical & Chemical properties

Surface tension

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Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-09-02
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guidelineopen allclose all
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to guideline
Guideline:
other: DIN EN 14370
Principles of method if other than guideline:
Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl] build a stable emulsion with water. Therefore the surface tension was determined for a 1 g/L emulsion at 20 °C according to DIN EN 14370 (replaced DIN 53914) using the Wilhelmy plate method. Bidestilled water and 1-octanol have been measured as calibration and control sample.
GLP compliance:
no
Type of method:
plate method

Test material

Constituent 1
Chemical structure
Reference substance name:
Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl]
EC Number:
930-947-3
IUPAC Name:
Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl]

Results and discussion

Surface tension
Surface tension:
27.8 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Any other information on results incl. tables

Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl] builds a stable emulsion with water. Therefore the surface tension was determined for a 1 g/L emulsion at 20 °C according to DIN EN 14370 using the Wilhelmy plate method. The surface tension of the test material was determined to be 27.8±0.1 mN/m at 20 °C. The individual results of the five measurements are compiled in the following table:

Measurement test item

Time [s]

Surface tension [mN/m]

1

1.04

27.83918

2

31.03

27.74648

3

62.15

27.70745

4

92.05

27.66110

5

123.00

27.63670

Average [mN/m]

 

27.72

Deviation [mN/m]

 

0.08

Corrected Result

 

27.77

 

Applicant's summary and conclusion

Conclusions:
The surface tension of Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl] was determined to be 27.8±0.1 mN/m at 20 °C.
Executive summary:

The surface tension of Amides, C8-18 even numbered, N-[3-(dimethylamino)propyl] was determined for a 1 g/L emulsion at 20 °C according to DIN EN 14370 using the Wilhelmy plate method. The surface tension of the test material was determined to be 27.8±0.1 mN/m at 20 °C. The test item has to be regarded as surface active.