N-(dodecylphenyl)naphthalen-1-amine

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Between 17 August 2000 and 14 September 2000.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

Method A5 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).

Deviations:

yes

Remarks:

See "Any other information" for details

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Specific details on test material used for the study:

No further details specified in the study report.

Key result

Surface tension:

72.6 mN/m

Temp.:

21 °C

Conc.:

0 g/L

Key result

Surface tension:

65.6 mN/m

Temp.:

21 °C

Conc.:

0.008 g/L

Sample solution concentration

The mean peak areas relating to the standard and sample solutions

Solution	Mean Peak Area
Standard 2.15 mg/l Standard 2.04 mg/l Sample A Sample B Sample C Sample D	53.756 51.315 0.991 1.082 86.410 112.118
Mean sample solution concentration (A and B, test solution 2) = 8.28 x 10^-5g/l Mean sample solution concentration (C and D, test solution 1) = 7.93 x 10^-3g/l

 

Calibration factor (Ø)

The readings, temperatures and the corresponding calibration factors for glass double-distilled water

Reading (mN/m)	Temperature (°C)	Literature Value (mN/m)	Calibration Factor
72.50	21.0	76.20	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
73.00	21.0	72.60	0.995
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
72.50	21.0	72.60	1.001
Mean Calibration Factor of all readings for test solution 2 = 1.001 Mean Calibration Factor of last five readings for test solution 1 = 1.001

 

Sample solution readings

The readings, times and temperatures for the sample solutions

Time (mins)		Reading (mN/m)		Temperature (°C)
Test solution 1	Test solution 2	Test solution 1	Test solution 2	Test solution 1	Test solution 2
60 71 82 93 103 112 127 133	66 76 88 98 107 116 - -	64.00 64.00 64.00 65.60 65.50 65.50 65.50 65.50	72.50 72.50 72.50 72.50 72.50 72.50 - -	21.0 21.0 21.0 21.0 21.0 21.0 21.0 21.0	21.0 21.0 21.0 21.0 21.0 21.0 - -

Mean of last 5 readings for Test solution 1 = 65.5 mN/m

Mean of all readings for Test solution 2 = 72.5 mN/m

Surface tension = reading x calibration factor

Test solution 1  = 65.5 x 1.001

                    = 65.6 mN/m

Test solution 2 = 72.5 x 1.001

                   = 72.6 mN/m

Temperature = 21.0 ± 0.5°C

pH of test solution 1 = 5.8

pH of test solution 2 = 5.7

Conclusions:

The surface tension of a 8.28e-5 g/l solution of test material has been determined to be 72.6 mN/m at 21.0 ± 0.5 °C. The surface tension of a 7.93e-3 g/l solution of test material has been determined to be 65.6 mN/m at 21.0 ± 0.5 °C. The test material is considered not to be a surface active material.

Executive summary:

Surface Tension. 72.6 mN/m (8.28 x 10^-5 g/l solution), 65.6 mN/m (7.93 x 10^-3 g/l solution) at 21.0 ± 0.5 °C, using a ring method based on ISO 304 and Method A5 of Commission Directive 92/69/EEC. The test material is considered not to be a surface-active material.

Description of key information

Surface Tension. 72.6 mN/m (8.28 x 10^-5 g/l solution), 65.6 mN/m (7.93 x 10^-3 g/l solution) at 21.0 ± 0.5 °C.

Key value for chemical safety assessment

Surface tension:

65.6

in mN/m at 20°C and concentration in mg/L:

7.93

Additional information

Surface Tension. 72.6 mN/m (8.28 x 10^-5 g/l solution), 65.6 mN/m (7.93 x 10^-3 g/l solution) at 21.0 ± 0.5 °C, using a ring method based on ISO 304 and Method A5 of Commission Directive 92/69/EEC. The test material is considered not to be a surface-active material.