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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:
11 July - 20 July 2018
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:
ring method
Specific details on test material used for the study:
- Test material: Balsalazide acid
- Batch number: 0400
- Expiry date: April 2019
- Storage: Room temperature
Key result
Surface tension:
67.1 mN/m
Temp.:
20 °C
Conc.:
90 other: % of its saturation

Table 1: Surface Tension at 20°C

Measurements

Test item 90% saturation

(mN/m)

1

62.5

2

62.0

3

63.7

4

64.7

5

63.5

6

64.3

Average value

63.4

S.D.

1.04

RSD%

1.64%

Φb

1.0570

Corrected value

67.1

Conclusions:
The surface tension of Balsalazide acid in an aqueous solution at 90% of its saturation was found to be 67.1 mN/m at 20°C. Therefore, Balsalazide acid is not regarded as a surface-active material.

Description of key information

The surface tension of the test item, Balsalazide acid was determined according to OECD Guideline 115 and EC Method A.5 at 20°C and was found to be 67.1 mN/m in an aqueous solution at 90% of its saturation. Therefore, Balsalazide acid is not regarded as a surface active material.

Key value for chemical safety assessment

Surface tension:
67.1

Additional information