N-(1,3-dimethylbutylidene)-5-[(1,3-dimethylbutylidene)amino]-1,3,3-trimethylcyclohexanemethylamine

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 10, 2020 - June 15, 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.5 (Surface Tension)

GLP compliance:

yes

Specific details on test material used for the study:

Identification: CAS 71077-09-3
Appearance/Physical state: Pale yellow viscous liquid
Batch: 12846
Purity: 97.32%
Expiry date: 30 November 2020
Storage conditions: Room temperature, under nitrogen, in the dark

Key result

Surface tension:

61.3 mN/m

Temp.:

20.4 °C

Conc.:

90 vol%

The readings, times and temperatures for the sample solutions are shown in the following tables:

Sample 1

Age of Solution (min)       Reading (mN/m)       Temperature (°C)

82                                   67.0                            20.4

85                                    65.0                            20.4

89                                   63.5                            20.4

92                                   62.5                            20.4

95                                   62.0                            20.4

98                                   62.0                            20.4

102                                 62.5                            20.4

105                                 62.0                            20.4

Sample 2

Age of Solution (min)       Reading (mN/m)       Temperature (°C)

118                                    62.5                            20.2

122                                   62.5                            20.2

125                                   60.5                            20.4

130                                   60.5                            20.4

133                                   60.0                            20.4

136                                   60.0                            20.4

139                                   60.5                            20.4

Mean Sample 1 result (last 5 measurements): 62.2 mN/m pH of Sample 1: 10.45

Mean Sample 2 result (last 5 measurements): 60.3 mN/m pH of Sample 2: 10.46

Mean result : 61.3 mN/m

Range : 60.0 to 62.5 mN/m

Mean temperature : 20.4 ± 0.5 ºC

Conclusions:

The surface tension at nominally 90% saturated solution of test item in water has been
determined to be 61.3 mN/m at 20.4 ± 0.5 °C.
The test item was considered not to be surface-active.

Executive summary:

As the water solubility of the test item was less than 1 g/L; testing was performed on a 90% dilution of a saturated solution in purified water.

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

Description of key information

The surface tension at nominally 90% saturated solution of test item in water has been determined to be 61.3 mN/m at 20.4 ± 0.5 °C.

The test item was considered not to be surface-active.

Key value for chemical safety assessment

Surface tension:

61.3

Additional information

As the water solubility of the test item was less than 1 g/L; testing was performed on a 90% dilution of a saturated solution in purified water.

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.