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Surface tension

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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. For details and justification of read-across please refer to the read-across report attached to IUCLID section 13.
Reason / purpose for cross-reference:
read-across source
Key result
Surface tension:
70.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Conclusions:
Lactic acid is not a surface active substance.
Executive summary:

The OECD harmonized ring method was used for the determination of the surface tension of lactic acid 93 % aq. The surface tension of a test solution at a concentration of 1 g/L and at 20.0 °C was 70.7 mN/m. According to this, the test substance is considered not to be surface active.

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 read-across report attached to IUCLID section 13.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
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 read-across report attached to IUCLID section 13.
Reason / purpose for cross-reference:
read-across source
Surface tension:
46 mN/m
Temp.:
25 °C
Conc.:
90 g/L
Conclusions:
The surface tension of L-(+)-lactic acid is 46 mN/m at 25 °C.
Executive summary:

According to Holten the surface tension of L-(+)-lactic acid is 46 mN/m at 25 ° at a concentration of 90 g/L.

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 read-across report attached to IUCLID section 13.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
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 read-across report attached to IUCLID section 13.
Reason / purpose for cross-reference:
read-across source
Surface tension:
44.9 mN/m
Temp.:
25 °C
Conc.:
79 other: % w/w
Surface tension:
47.3 mN/m
Temp.:
25
Conc.:
20 other: % w/w
Conclusions:
Surface tension of a concentrated solution is not a relevant property.
Executive summary:

Based on the retrieved results, the surface tension of a concentrated solution of L-lactic acid is not a relevant property.

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 read-across report attached to IUCLID section 13.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
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 read-across report attached to IUCLID section 13.
Reason / purpose for cross-reference:
read-across source
Surface tension:
58.9 mN/m
Temp.:
22 °C
Conc.:
10 g/L
Conclusions:
The surface tension of a 1 % solution is not compliant with the test guideline OECD 115, requiring a maximum concentration of 1 g/L.
Executive summary:

The surface tension of a 1 % solution is not compliant with the test guideline OECD 115, requiring a maximum concentration of 1 g/L.

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 read-across report attached to IUCLID section 13.

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

A standardized test conducted according to OECD TG 115 resulted in the determination that a 1 g/L solution of lactic acid in water has a surface tension of 70.7 mN/m. Based on the results, it can be concluded that lactic acid is not a surface active substance.

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