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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study without GLP
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
no
Type of method:
ring method
Surface tension:
29.5 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Results in mN/m:

 Test item  Water calibration  1st TS, c = 1.088 g/L  2nd TS, c = 1.104 g/L
 Value 1  71.7  29.4  29.2
 Value 2  71.7  29.3  29.2
 Value 3  71.8  29.3  29.2
 Value 4  71.7  29.2  29.1
 Value 5  71.8  29.2  29.2
 Value 6  71.8  29.2  29.2
 Arithmetic mean  71.8  29.3  29.2
 Standard deviation  0.1  0.1  0

Calculation:

Arithmetic mean of two test solutions: 29.25 mN/m

Water theoretical value: 72.4 mN/m

Correction factor: 1.0084

Arithmetic mean corrected by calibration factor determined via water calibration: 29.5 mN/m

Executive summary:

The test item octanoic acid, monoester with glycerol has a surface tension of 29.5 mN/m (c = 1 g/L) in accordance with the test method A.5 "Surface Tension" as described in the Commission Regulation (EC) No. 440/2008 of 30 May 2008.

Description of key information

Key value for chemical safety assessment

Surface tension:
29.5
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

Guideline A.5 (similar to OECD Guideline 115): For this test the "ring-method" was used.