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Physical & Chemical properties

Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study not performed according to a guideline, but materials & methods and results are well described.
no guideline followed
Principles of method if other than guideline:
The surface tension was measured with a thermostated tensiometer (Digital Tensiometer K 10ST, Kru¨ss Gmbh, Germany) using a Wilhelmy plate method.14 The temperature was set to 25 °C and controlled with a circulation liquid path (Lauda RC6 CS). The oxalic acid was dissolved in water. Water was purified to ultrapure quality (Milli-Q, 18 M).
GLP compliance:
not specified
Type of method:
plate method
Key result
Surface tension:
ca. 70.1 mN/m
25 °C
0.015 other: molar fraction

no data

Surface tension of the substance is not lower than 60 mN/m, then oxalic acid should not be regarded as being surface-active

Description of key information

Key value for chemical safety assessment

Surface tension:
in mN/m at 20°C and concentration in mg/L:
15 111

Additional information