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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:
04.10.2017
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:
no
Type of method:
ring method
Key result
Surface tension:
71.2 mN/m
Temp.:
20 °C
Conc.:
1 mg/L

Table 1: Surface tension










































Measurement



1



2



3



4



5



6



Time (s)



32



152



274



396



517



639



o (mN/m) uncorrected



76.73



76.81



76.81



76.81



76.60



76.66



o (mN/m) corrected according to Zuidema and Waters*



71.22



71.30



71.31



71.31



71.10



71.15



Mean value: σ = 71.2 mN/m (corrected according to Zuidema and Waters*)


The aqueous solution of the test item had a mean surface tension of 71.2 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

Conclusions:
The surface tension of the aqueous solution at 20 °C was higher than 60 mN/m (71.2 mN/m). The test item had no surface-active properties.
Executive summary:

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2005 Method A.5 to determine the surface tension of an aqueous solution of the test item using the ring method. 250.2 mg of the lest item were put into 250 mL of demineralized water and stirred at ambient temperature for about 1 h. After adapting to 20 °C the measurement of the surface tension with the test item was carried out at 20 ± 0.5 °C (19.8 °C). The measurements were repeated until 6 measurements were within the limits of the stability criterion. The aqueous solution of the test item had a mean surface tension of 71.2 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

Description of key information

The surface tension of the aqueous solution at 20 °C was higher than 60 mN/m (71.2 mN/m). The test item had no surface-active properties (reference 4.10-1).

Key value for chemical safety assessment

Surface tension:
71.2
in mN/m at 20°C and concentration in mg/L:
1

Additional information

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2005 Method A.5 to determine the surface tension of an aqueous solution of the test item using the ring method. 250.2 mg of the lest item were put into 250 mL of demineralized water and stirred at ambient temperature for about 1 h. After adapting to 20 °C the measurement of the surface tension with the test item was carried out at 20 ± 0.5 °C (19.8 °C). The measurements were repeated until 6 measurements were within the limits of the stability criterion. The aqueous solution of the test item had a mean surface tension of 71.2 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties (reference 4.10-1).