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Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
13 March 2018 - 27 March 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
1995
Deviations:
no
GLP compliance:
yes
Type of method:
OECD harmonised ring method

Test material

Constituent 1
Reference substance name:
Extract obtained from the shell of Theobroma cacao (Malvaceae) by co-extraction with ethanol and propylene glycol
EC Number:
948-055-8
Molecular formula:
not applicable as it is a UVCB
IUPAC Name:
Extract obtained from the shell of Theobroma cacao (Malvaceae) by co-extraction with ethanol and propylene glycol
Test material form:
liquid: viscous
Details on test material:
- Physical appearance: dark brown to black viscous liquid
- Storage conditions: in refrigerator (2-8°C) protected from light

Results and discussion

Surface tension
Key result
Surface tension:
70.6 mN/m
Temp.:
20 °C
Remarks on result:
other: Conc.= 90% of test item saturation solubility

Any other information on results incl. tables

Table: Surface tension measurements

Measurement

Time passed after transfer test solution to test vessel
[minutes]

Surface tension
(mN/m)

individual

mean

mean (2)

1

15

71.2

70.0(1)

70.6

2

16

71.2

 

 

3

17

70.1

 

 

4

18

70.0

 

 

5

19

70.2

 

 

6

20

69.8

 

 

7

21

69.9

 

 

(1)Mean calculated from measurements 3 to 7, after equilibrium was reached.

(2) Mean multiplied by the calibration factor and Harkins-Jordan corrected.

Applicant's summary and conclusion

Conclusions:
The surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 70.6 mN/m (at 20°C).

Executive summary:

Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 70.6 mN/m (at 20°C). According to the EC A.5 guideline the substance is not surface active.