Registration Dossier

Diss Factsheets

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
July 14, 2010 / July 28, 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
GLP compliance:
no
Type of method:
ring method

Test material

Constituent 1
Reference substance name:
Cinnamomum zeylanicum, ext.
EC Number:
283-479-0
EC Name:
Cinnamomum zeylanicum, ext.
Cas Number:
84649-98-9
Molecular formula:
Not Applicable due to UVCB
IUPAC Name:
Cinnamomum zeylanicum, ext.
Constituent 2
Reference substance name:
Cinnamon Leaf Oil - Cinnamomum Zeylancium
IUPAC Name:
Cinnamon Leaf Oil - Cinnamomum Zeylancium
Details on test material:
Identification: Cinnamon Leaf Oil - Cinnamomum Zeylancium

Purity: 100%
Expiry Date: June 30, 2012
Storage Conditions: At room temperature at about 20 °C

Results and discussion

Surface tension
Key result
Surface tension:
49.4 mN/m
Temp.:
20.1 °C
Remarks on result:
other: Concentration not available because the solution was saturated

Any other information on results incl. tables

The determination of the surface tension of an aqueous solution of Cinnamon Leaf Oil - Cinnamomum Zeylancium was based on the OECD Guideline No. 115: “Surface Tension of Aqueous Solutions” (1995) and on the EEC Directive 92/69, EEC Publication No. L383, December 1992 and the Council Regulation (EC) No. 440/2008, 30 May 2008, Part A, Methods for the determination of physico-chemical properties, A.5 “Surface tension”.

 

The calibration factor Φb was determined to be 1.0244 for double distilled water (Table 1). The data are part of Harlan Laboratories' instruments files and a copy is presented in the raw data of thepresent study.

 

Table2 shows the individual measurements for the surface tension of the aqueous test item solution. From these, the mean and the corrected value for the given solution were calculated and are also shown in Table2. The tabulated values represent rounded results obtained from calculation using the exact raw data.

Table1       Determination of the Calibration Factor Using Water

Time expired

Temperature

Surface tension

[mN/m]

Calibration factor

measured

 

mean value

calculated from the bold values

[hours:min]

[°C]

 

σg

Φb

00:32

19.9

71.2

71.03

1.0244

00:34

19.9

71.2

00:35

19.9

71.0

00:36

19.9

71.0

00:37

19.9

70.9

00:38

19.9

70.9

 

 

with

 

σo     =      72.765 mN/m at 19.9 °C

Φb    =      σo/ σg

Φb    =      72.765 / 71.03 = 1.0244

 

where

 

Φb    =      calibration factor

σo     =      the surface tension of water at the test temperature

σg     =      measured value of the surface tension of waterat the test temperature

 

Table2       Determination of Surface Tension for the Test Item

Time expired

Temperature

Surface tension

[mN/m]

 

 

measured

mean value calculated from the bold values

mean value corrected for calibration

s1corrected for Harkins-Jordan

[hours:min]

[°C]

[mN/m]

(σ *)

(σ 1)

(σ )

First sample

 

 

 

 

00:33

20.4

49.6

49.35

50.55

49.18

00:34

20.4

49.3

00:35

20.4

49.3

00:36

20.4

49.3

00:37

20.4

49.3

00:38

20.4

49.3

Second sample

 

 

 

 

00:31

19.9

49.8

49.80

51.01

49.66

00:32

19.9

49.8

00:33

19.9

49.8

00:34

19.9

49.8

00:35

19.9

49.8

00:36

19.9

49.8

 

Mean value from both samples:                                                σ = 49.4 mN/m

 

with

σ* · Φb =  σ1

Φb        =  calibration factor = 1.0244

and

σ1· Fc   =  σ

Fc         =  factor for correction acc. to Harkins-Jordan
             =  0.973 for 50.55 mN/m and 0.974 for 51.01 mN/m

Applicant's summary and conclusion

Conclusions:
The surface tension of Cinnamon Leaf Oil - Cinnamomum Zeylancium in water (90% of saturation concentration) was determined to be 49.4 mN/m at 20.1 °C ± 0.3 °C. Based on the criteria as outlined in the EEC Guideline and the results of this study, Cinnamon Leaf Oil - Cinnamomum Zeylancium has to be considered as a surface active substance.
Executive summary:

The surface tension of Cinnamon Leaf Oil - Cinnamomum Zeylancium in water (90% of saturation concentration) was determined to be

49.4 mN/mat 20.1 °C± 0.3 °C. Based on the criteria as outlined in the EEC Guideline and the results of this study, Cinnamon Leaf Oil - Cinnamomum Zeylancium has to be considered as a surface active substance.

 

Categories Display