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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-01-13 - 2009-03-10
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The GLP study was conducted according to an internationally accepted guideline. All study parameters are based on the specific guideline.
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
yes
Remarks:
The volumetric flask was cleaned with acetone, deionised water and water for HPLC purposes, but not with isopropanole.
GLP compliance:
yes (incl. certificate)
Type of method:
plate method
Surface tension:
68.91 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Measurement

Time

Mass

Surface Tension

Temperature

No

s

g

mN/m

°C

1

3.00

0.2838

69.23

20.0

2

5.90

0.2825

68.91

20.0

3

8.90

0.2826

68.94

20.0

4

11.90

0.2824

68.89

20.0

5

14.90

0.2824

68.89

20.0

6

17.90

0.2824

68.89

20.0

7

20.90

0.2823

68.87

20.0

8

23.90

0.2823

68.87

20.0

9

26.90

0.2821

68.82

20.0

10

29.90

0.2822

68.84

20.0

Mean

68.91

 

Standard Deviation

0.12

 

Measurement

Time

Mass

Surface Tension

Temperature

No

s

g

mN/m

°C

1

2.9

0.2711

66.13

20.0

2

5.9

0.2718

66.30

20.0

3

8.8

0.2718

66.30

20.0

4

11.9

0.2717

66.28

20.0

5

14.9

0.2717

66.28

20.0

6

17.8

0.2714

66.21

20.0

7

20.9

0.2725

66.48

20.0

8

23.9

0.2712

66.16

20.0

9

26.9

0.2724

66.45

20.0

10

29.9

0.2710

66.11

20.1

Mean

66.27

 

Standard Deviation

0.12

 

Conclusions:
The surface tension of N-[(3(5)-Methyl-1 H-pyrazol-1 -yl)-methyl]acetamide was determined according to OECD Guideline 115 (Surface Tension of Aqueous Solutions).
During a certain period of time, no significant changes in the surface tension were detected. In dependence on time and temperature, values between 68.91 and 66.27 mN/m were recorded showing no significant variations. As the determined surface tension of the test item was higher than 60 mN/m, the test item is classified as not surface active.
Executive summary:

The surface tension of N-[(3(5)-Methyl-1 H-pyrazol-1 -yl)-methyl]acetamide was determined according to OECD Guideline 115 (Surface Tension of Aqueous Solutions).

During a certain period of time, no significant changes in the surface tension were detected. In dependence on time and temperature, values between 68.91 and 66.27 mN/m were recorded showing no significant variations. As the determined surface tension of the test item was higher than 60 mN/m, the test item is classified as not surface active.

Description of key information

The surface tension of N-[(3(5)-Methyl-1 H-pyrazol-1 -yl)-methyl]acetamide was determined according to OECD Guideline 115 (Surface Tension of Aqueous Solutions).

During a certain period of time, no significant changes in the surface tension were detected. In dependence on time and temperature, values between 68.91 and 66.27 mN/m were recorded showing no significant variations. As the determined surface tension of the test item was higher than 60 mN/m, the test item is classified as not surface active.

Key value for chemical safety assessment

Surface tension:
68.91
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The surface tension of N-[(3(5)-Methyl-1 H-pyrazol-1 -yl)-methyl]acetamide was determined as 68.91 mN/m.