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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:
From 25 January 2005 to 12 May 2005
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
GLP compliance
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
yes
Remarks:
see below
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
yes
Remarks:
see below
Principles of method if other than guideline:
The determination was carried out using a White Electrical Institute interfacial tension balance and a procedure based on the ISO 304 ring method.
Deviation: The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. 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 m.N/m); this is as a result of the reduced ring dimensions.
This deviation has been considered not to have affected the integrity of the study.
GLP compliance:
yes (incl. QA statement)
Remarks:
(2 December 2002)
Type of method:
ring method
Key result
Surface tension:
69.2 mN/m
Temp.:
21.8 °C
Conc.:
1 g/L

- Calibration factor ɸ

Table 1: Readings, temperatures and the corresponding calibration factors for glass double-distilled water

Reading (mN/m)

Temperature (°C)

Literature value (mN/m)

Calibration factor

72.5

21.8

72.47

1.000

72.5

21.8

72.47

1.000

72.5

21.8

72.47

1.000

72.0

21.8

72.47

1.007

72.5

21.8

72.47

1.000

72.5

21.8

72.47

1.000

72.5

21.8

72.47

1.000

Mean calibration factor = 1.001

- Sample solution readings

Table 2: Readings, times and temperatures for the sample solution

Time (mins)

Reading (mN/m)

Temperature (°C)

74

69.0

21.8

82

69.0

21.8

89

69.5

21.8

97

69.0

21.8

106

69.0

21.8

114

69.0

21.8

Mean reading: 69.1 mN/m

Surface tension = reading x calibration factor

= 1.001 x 69.1

= 69.2 mN/m

Temperature: 21.8 ± 0.5°C

- Discussion

Substances having a surface tension below 60 mN/m are regarded as being surface-active.

Conclusions:
The surface tension of a 1.00 g/L solution of test material has been determined to be 69.2 mN/m at 21.8 ± 0.5°C. The test material is considered not to be a surface-active material.
Executive summary:

The determination of the surface tension of Monofluoroethylene carbonate was performed using a ring method based on ISO 304, OECD Guideline n°115 and EU Method A.5, under GLP conditions. The surface tension of a 1.00 g/L solution of test material has been determined to be 69.2 mN/m at 21.8 ± 0.5°C. The test material is considered not to be a surface-active material.

Description of key information

The surface tension of a 1.00 g/L solution of test material has been determined to be 69.2 mN/m at 21.8 ± 0.5°C. The test material is considered not to be a surface-active material.

Key value for chemical safety assessment

Surface tension:
69.2
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information