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Diss Factsheets

Physical & Chemical properties

Surface tension

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
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)
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Specific details on test material used for the study:
Name: Phosphoric acid, C14-15 branched and linear alkyl esters, potassium salts
CAS No.: 1893414-79-3
Physical state: white solid at 20 °C
Batch No.: PU61810016
Re-certification date of batch: 09 March 2018
Purity: 100 % (UVCB, lyophilized solid, water content 0.85 % (w/w))
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light
Key result
Surface tension:
29.9 mN/m
Temp.:
19.9 °C
Conc.:
107 mg/L
Remarks on result:
other:
Remarks:
Age of solution 3h
Key result
Surface tension:
37.5 mN/m
Temp.:
20.1 °C
Conc.:
110 mg/L
Remarks on result:
other:
Remarks:
Age of solution 4h

The exact surface surface tension of the test item could not be determined because the lamella breaks before reaching stable surface tension values. The lamella breaks between surface tensions of 29.9 mN/m and 37.5 mN/m at a temperature between 19.9 °C and 20.1 °C. Since the test item showed before lamella break a surface tension lower than 60 mN/m under the conditions of this method the test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.  

Conclusions:
The exact surface surface tension of the test item could not be determined because the lamella breaks before reaching stable surface tension values. The lamella breaks between surface tensions of 29.9 mN/m and 37.5 mN/m at a temperature between 19.9 °C and 20.1 °C. Since the test item showed before lamella break a surface tension lower than 60 mN/m under the conditions of this method the test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.
Executive summary:

The exact surface surface tension of the test item could not be determined because the lamella breaks before reaching stable surface tension values. The lamella breaks between surface tensions of 29.9 mN/m and 37.5 mN/m at a temperature between 19.9 °C and 20.1 °C. Since the test item showed before lamella break a surface tension lower than 60 mN/m under the conditions of this method the test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.  

Description of key information

The exact surface surface tension of the test item could not be determined because the lamella breaks before reaching stable surface tension values. The lamella breaks between surface tensions of 29.9 mN/m and 37.5 mN/m at a temperature between 19.9 °C and 20.1 °C. Since the test item showed before lamella break a surface tension lower than 60 mN/m under the conditions of this method the test item will be regarded as being surface-active material according to Council Regulation (EC) No 440/2008.  

Key value for chemical safety assessment

Surface tension:
29.9
in mN/m at 20°C and concentration in mg/L:
107

Additional information