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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:
15 May 2010 to 18 May 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study performed according to Brazilian guideline method
Qualifier:
according to guideline
Guideline:
other: ABNT Agrotoxico- Determinacao da Tensao Superficial NBR 13241
Principles of method if other than guideline:
The average number of drops per volume of water was compared against the average number of drops per volume of a test solution.
GLP compliance:
yes (incl. QA statement)
Type of method:
other: Relative drop volume method
Key result
Surface tension:
0.068 N/m
Temp.:
20 °C
Conc.:
1 vol%

Table 1: Results

 

Number of Drops

Surface Tension (N m^-1)

Water

Test Material

Replicate 1

108

116

0.06701

Replicate 2

105

113

0.06687

Replicate 3

109

114

0.06881

Conclusions:
Under the conditions of this study, the surface tension of a 1 % (m/v) solution of the test material in water at 20 °C was 0.06756N/m.
Executive summary:

The surface tension of the test material was investigated in accordance with the Brazilian guideline NBR 13241, under GLP conditions.

Under the conditions of this study, the surface tension of a 1 % (m/v) solution of the test material in water at 20 °C was 0.06756N/m.

Description of key information

Under the conditions of this study, the surface tension of a 1 % (m/v) solution of the test material in water at 20 °C was 0.06756 N/m.

Key value for chemical safety assessment

Surface tension:
67.56
in mN/m at 20°C and concentration in mg/L:
1

Additional information

The surface tension of the test material was investigated in accordance with the Brazilian guideline NBR 13241, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the surface tension of a 1 % (m/v) solution of the test material in water at 20 °C was 0.06756 N/m.