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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:
14 June 2016 to 04 October 2016
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
Key result
Surface tension:
48.1 mN/m
Temp.:
21.5 °C
Conc.:
90 other: % saturation
Remarks on result:
other: pH 3.5

TABLE 6 – READINGS, TIMES AND TEMPERATURES FOR SAMPLE 1

Age of solution (min)

Reading (mN/m)

Temperature (°C)

115

48.5

21.8

123

48.5

21.8

142

48.5

21.8

151

48.5

21.8

160

48.5

21.8

 

TABLE 7 – READINGS, TIMES AND TEMPERATURES FOR SAMPLE 2

Age of solution (min)

Reading (mN/m)

Temperature (°C)

230

48.0

21.4

239

47.5

21.4

248

47.5

21.4

256

47.5

21.4

265

47.5

21.2

 

Mean Sample 1 result: 48.5 mN/m (pH 3.5)

Mean Sample 2 result: 47.6 mN/m (pH 3.5)

Mean result: 48.1 mN/m

Overall temperature: 21.5±0.5°C

Conclusions:
The surface tension of solutions prepared at nominally 1.1 g/L of test item in water and diluted to 90 % saturation was determined to be 48.1 mN/m at 21.5 ± 0.5 °C and the substance was considered to be surface-active.
Executive summary:

GUIDLELINE

The determination was carried out by a ring method, using a procedure 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 the Testing of Chemicals, 27 July 1995.

 

RESULTS

The surface tension of solutions prepared at nominally 1.1 g/L of test item in water and diluted to 90 % saturation was determined to be 48.1 mN/m at 21.5 ± 0.5 °C and the substance was considered to be surface-active.

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)
Justification for type of information:
See read-across justification attached in Section 13.
Reason / purpose:
read-across source
Key result
Surface tension:
48.1 mN/m
Temp.:
21.5 °C
Conc.:
90 other: % saturation
Remarks on result:
other: pH 3.5

Description of key information

The surface tension of analogue test item solutions prepared at nominally 1.1 g/L in water and diluted to 90 % saturation was determined to be 48.1 mN/m at 21.5 ± 0.5 °C and the substance was considered to be surface-active (OECD 115 and EU Method A.5).

Key value for chemical safety assessment

Surface tension:
48.1
in mN/m at 20°C and concentration in mg/L:
990

Additional information

GUIDLELINE

The determination was carried out by a ring method, using a procedure 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 the Testing of Chemicals, 27 July 1995.

 

RESULTS

The surface tension of analogue test item solutions prepared at nominally 1.1 g/L in water and diluted to 90 % saturation was determined to be 48.1 mN/m at 21.5 ± 0.5 °C and the substance was considered to be surface-active.