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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:
1991
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)
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Qualifier:
according to guideline
Guideline:
other: ISO 304 (Surface active agents - Determination of Surface Tension by drawing up Liquid Films)
GLP compliance:
yes
Type of method:
plate method
Remarks:
Wilhelmy plate method
Specific details on test material used for the study:
Name: Monoazo Red SR 6947
Purity: 89.3%
Storage: room temperature, 20 - 24 °C
Surface tension:
>= 66.3 - <= 66.4 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: after 30 minutes
Surface tension:
>= 55.1 - <= 55.4 mN/m
Temp.:
20 °C
Conc.:
10 g/L
Remarks on result:
other: after 15 minutes
Conclusions:
The surface tension of an aqueous solution of the test solution at 20 °C by the Wilhelmy plate method lies between 66.3 - 66.4 mN/m at a concentration of 1 g/L and between 55.1 - 55.4 mN/m at a concentration of 10 g/L.
Executive summary:

In a GLP compliant study, performed according to EC method A.5, the surface tension of the test substance was determined using the Wilhelmy plate method.

The surface tension of an aqueous solution of the test substance at 20°C lies between 66.3 - 66.4 mN/m at a concentration of 1 g/L and between 55.1 - 55.4 mN/m at a concentration of 10 g/L.

Description of key information

The surface tension of an aqueous solution of Reactive Red 245 at 20 °C by the Wilhelmy plate method lies between 66.3 - 66.4 mN/m at a concentration of 1 g/L and between 55.1 - 55.4 mN/m at a concentration of 10 g/L.

Key value for chemical safety assessment

Surface tension:
55.1
in mN/m at 20°C and concentration in mg/L:
10

Additional information

In a GLP compliant study, performed according to EC method A.5, the surface tension of the test substance was determined using the Wilhelmy plate method.

The surface tension of an aqueous solution of the test substance at 20°C lies between 66.3 - 66.4 mN/m at a concentration of 1 g/L and between 55.1 - 55.4 mN/m at a concentration of 10 g/L.

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