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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
Study period:
16 September to 09 December 2015
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Surface tension:
56.2 mN/m
Temp.:
22 °C
Conc.:
1 g/L
Remarks on result:
other: The test item was considered to be surface active - dependent on the loading rate
Surface tension:
66.5 mN/m
Temp.:
22 °C
Conc.:
0.1 g/L
Remarks on result:
other: The test item was considered to be surface active - dependent on the loading rate

The readings, times and temperatures for the sample solutions are shown in Figures 3.10, 3.11, 3.12 & 3.13 attached

Conclusions:
Surface tension was determined to be 66.5 ± 2.0 mN/m for the 0.11 g/L loading rate and 56.2 ± 1.0 mN/m for the 1.1 g/L loading rate at 22.0 ± 0.5°C. The test item was considered to be surface active but this was dependent on loading rate.
Executive summary:

GUIDELINE

Surface tension was investigated using a ring method designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the oECD Guidelines for Testing of Chemicals, 27 July 1995.

METHOD

The surface tension of nominally 90 % saturated solutions was determined using two loading rates (0.11 and 1.1 g/L) at 22.0 ± 0.5 °C.

RESULTS

Surface tension was determined to be 66.5 ± 2.0 mN/m for the 0.11 g/L loading rate and 56.2 ± 1.0 mN/m for the 1.1 g/L loading rate at 22.0 ± 0.5°C.

CONCLUSION

The test item was considered to be surface active but this was dependent on loading rate.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Reason / purpose for cross-reference:
read-across source
Surface tension:
56.2 mN/m
Temp.:
22 °C
Conc.:
1 mg/L
Remarks on result:
other: The test item was considered to be surface active - dependent on the loading rate
Surface tension:
66.5 mN/m
Temp.:
22 °C
Conc.:
0.1 mg/L
Remarks on result:
other: The test item was considered to be surface active - dependent on the loading rate

Description of key information

Surface tension was determined to be 66.5 ± 2.0 mN/m for the 0.11 g/L loading rate and 56.2 ± 1.0 mN/m for the 1.1 g/L loading rate at 22.0 ± 0.5°C. The analogue test item was considered to be surface active but this was dependent on loading rate (OECD 115 and EU Method A.5).

Key value for chemical safety assessment

Additional information

GUIDELINE

Surface tension was investigated using a ring method designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the oECD Guidelines for Testing of Chemicals, 27 July 1995.

METHOD

The surface tension of nominally 90 % saturated solutions was determined using two loading rates (0.11 and 1.1 g/L) at 22.0 ± 0.5°C.

RESULTS

Surface tension was determined to be 66.5 ± 2.0 mN/m for the 0.11 g/L loading rate and 56.2 ± 1.0 mN/m for the 1.1 g/L loading rate at 22.0 ± 0.5°C.

CONCLUSION

The analogue test item was considered to be surface active but this was dependent on loading rate.