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Physical & Chemical properties

Surface tension

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Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method
Surface tension:
70.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Conclusions:
A standardized test for the surface tension of lactic acid resulted in the determination that a 1g/L solution of lactic acid in water has a surface tension of 70.7 mN/m; at this surface tension, it can be concluded that lactic acid is not a surface active substance.
Executive summary:

According to the OECD 115 Guideline the surface tension of lactic acid with a concentration of 1g/L solution of lactic acid in water the surface tension is 70.7 mN/m; at this surface tension, it can be concluded that lactic acid is not a surface active substance.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
This information is used in a read-across approach in the assessment of the target substance.

Reason / purpose:
read-across source
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method
Surface tension:
70.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Conclusions:
A standardized test for the surface tension of lactic acid resulted in the determination that a 1g/L solution of lactic acid in water has a surface tension of 70.7 mN/m; at this surface tension, it can be concluded that lactic acid is not a surface active substance.
Executive summary:

According to the OECD 115 Guideline the surface tension of lactic acid with a concentration of 1g/L solution of lactic acid in water the surface tension is 70.7 mN/m; at this surface tension, it can be concluded that lactic acid is not a surface active substance.

This information is used in a read-across approach in the assessment of the target substance.

For details and justification of read-across please refer to the attached report in section 13 of IUCLID.

Description of key information

Lactic acid is not surface active.

Key value for chemical safety assessment

Surface tension:
70.7
in mN/m at 20°C and concentration in mg/L:
1

Additional information