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Diss Factsheets

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:
January 2020
Reliability:
1 (reliable without restriction)
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
no
Type of method:
other: TOC
Specific details on test material used for the study:
Name
Fosfotex C16/18 DEA
Composition see Composition 1.2
Storage
room temperature (20 ± 5 °C)
Key result
Surface tension:
< 60 mN/m
Temp.:
20 °C
Conc.:
103.26 mg/L

The calculated value for the surface tension of H2O at 19.7 °C is: 72.78 mN/m

During a certain period of time, no significant changes (second and third measurement series) in the surface tension were detected. In dependence on time and temperature, values between 44.08 and 50.57 mN/m were recorded showing no significant variations.

As the determined surface tension of Fosfotex C16/18 DEA was lower than 60 mN/m, the test substance can be classified as:

surface active in a concentration of 103.26 mg test substance/L(in a solution at 90% saturation obtained from an aqueous solution prepared with 1.00 g/L of test item slow-shaking in standing position for 3 days).

Conclusions:
surface tension < 60 mN/m. B The test item has surface active properties.

Executive summary:

The substance Fosfotex C16/18 DEA was tested according to OECD115, EU A.5, not in GLP.

Surface tension of Fosfotex C16/18 DEA was lower than 60 mN/m, the test substance can be classified as:

surface active in a concentration of 103.26 mg test substance/L (in a solution at 90% saturation obtained from an aqueous solution prepared with 1.00 g/L of test item slow-shaking in standing position for 3 days).

Because the test item shows a surface tension lower than 60 mN/m, the test item has surface active properties.

Surface activity is a desired property of the material.

Description of key information

Surface tension < 60 mN/m at 193.26 mg/L.

Key value for chemical safety assessment

Surface tension:
60
in mN/m at 20°C and concentration in mg/L:
20

Additional information

The test item was tested according to OECD115, EU A.5.

Because the test item shows a surface tension lower than 60 mN/m, the test item has surface active properties.

Surface activity is a desired property of the material.