5-methylheptan-3-one oxime

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

01 April 2014 to 31 May 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Specific details on test material used for the study:

Batch: PE00083052
Purity: 96.3%

Surface tension:

45.3 mN/m

Temp.:

20 °C

Remarks on result:

other: The surface tension of a 90% saturated solution of test item in water has been determined to be 45.3 mN/m at 20 ± 0.5 °C. The test item is considered to be a surface-active item.

Calibration factor

The readings, temperatures and the corresponding calibration factors for high quality water are shown in the following tables:

Sample 1 

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.0	20.0	72.72	1.010
72.0	20.0	72.72	1.010
72.5	20.0	72.72	1.003
72.5	20.0	72.72	1.003
72.0	20.0	72.72	1.010
72.5	20.0	72.72	1.003
Mean Calibration Factor = 1.007

 

Sample 2

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.5	20.0	72.72	1.003
72.5	20.0	72.72	1.003
72.5	20.0	72.72	1.003
72.0	20.0	72.72	1.010
72.0	20.0	72.72	1.010
72.5	20.0	72.72	1.003
Mean Calibration Factor = 1.005

Sample solution readings

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

Sample 1

 

Time (mins)	Reading (mN/m)	Temperature (ºC)
62	45.0	20.0
87	45.5	20.0
111	45.5	20.0
135	45.5	20.0
159	45.5	20.0
Mean sample reading = 45.4

 

Sample 2

Time (mins)	Reading (mN/m)	Temperature (ºC)
75	45.0	20.0
99	45.0	20.0
123	45.5	20.0
147	45.0	20.0
183	45.5	20.0
Mean sample reading = 45.2

 

Surface tension          =                     reading x calibration factor
Sample 1        =                                 45.4 mN/m
Sample 2        =                                 45.2 mN/m
Mean  :                                              45.3 mN/m
Temperature   :                                  20 ± 0.5 ºC
pH of sample solution:                     Sample 1 = 5.94
                                                           Sample 2 = 5.98

Discussion

A platinum ring with a reduced circumference of 4 cm was used, whereas the guidelines specify 6 cm. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m). This procedure with respect to the reduced ring dimensions has been considered not to have affected the integrity of the test.

Substances showing a surface tension lower than 60 mN/m under the conditions of this method, should be regarded as being surface active.

Conclusion

The surface tension of a 90% saturated solution of test item in water has been determined to be 45.3 mN/m at 20 ± 0.5 °C. The test item is considered to be a surface-active item.

Conclusions:

The surface tension of a 90% saturated solution of test item in water has been determined to be 45.3 mN/m at 20 ± 0.5 °C. The test item is considered to be a surface-active item.

Executive summary:

Surface Tension. The mean surface tension of duplicate 90% saturated aqueous solutions of test item has been determined to be 45.3 mN/m (individual values 45.4 and 45.2 mN/m) at 20.0 ± 0.5 °C. Testing used a ring method, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered to be surface active.

Description of key information

45.3 mN/m  at 20.0 ± 0.5 °C

Key value for chemical safety assessment

Surface tension:

45.3

Additional information

Surface Tension. The mean surface tension of duplicate 90% saturated aqueous solutions of test item has been determined to be 45.3 mN/m (individual values 45.4 and 45.2 mN/m) at 20.0 ± 0.5 °C. Testing used a ring method, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered to be surface active.