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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From Oct 13, 2011 to Nov. 28, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
according to OECD and EU principles of GLP
Type of method:
ring method
Surface tension:
34.1 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: Mean surface tension (of test 1 and 2)

Table 2: Full test results (study 85858)

Test No

Test Temp (°C)

Solution Age (mins)

Surface Tension Reading (mN/m)

Corrected Value using calibration factor (mN/m)

Corrected Value for water calibration (mN/m)

1

20

5

34.5

36.6

34.1

2

20

11

34.5

36.6

34.1

Conclusions:
The mean surface tension of MEA-LAS as a 1 g/L solution was 34.1 mN/m at 20°C (measured by ring method (EU Method A.5)).
Executive summary:

The surface tension of MEA-LAS was determined following the EU Method A.5 (Surface Tension).

The measurements was made using a commercially available tensiometer. The measurement ring was made of a platinum-iridium wire of about 0.3 mm thickness and a mean circumference of approximately 40 mm.The solution (1 g/L) to be measured was transferred to the measurement vessel, taking care to avoid foaming. The measurement vessel was placed on the table of the test apparatus. The measurement vessel was raised until the ring was immersed below the surface of the solution. Subsequently, the tabletop was lowered gradually and evenly at a rate of approximately 0.5 cm min-1to detach the ring from the surface until the maximum force was reached. The force was read on the tensiometer. After completing the first measurement, a second test run was performed to confirm the first measurement.

The mean surface tension of MEA-LAS as a 1 g/L solution was 34.1 mN/m at20°C.

This surface tension test is classified as acceptable, and satisfies the guideline requirements of the EU Method A.5 (Surface Tension).

Description of key information

The surface tension of MEA-LAS was determined following EU Method A.5 (Surface Tension).

Key value for chemical safety assessment

Surface tension:
34.1
in mN/m at 20°C and concentration in mg/L:
1

Additional information