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Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 Dec 2009 to 11 Feb 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted to GLP and in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do no effect the quality of the relevant results.

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
yes
Remarks:
The result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used.
GLP compliance:
yes (incl. QA statement)
Remarks:
Date of inspection: 15-09-2009 Date of Signature: 26-11-2009
Type of method:
ring method

Test material

Constituent 1
Chemical structure
Reference substance name:
Cyclohexane-1,3-dione
EC Number:
207-980-0
EC Name:
Cyclohexane-1,3-dione
Cas Number:
504-02-9
Molecular formula:
C6H8O2
IUPAC Name:
cyclohexane-1,3-dione
Details on test material:
- Name of test material (as cited in study report): 1,3 cyclohexane dione
- Substance type: Powder
- Physical state: Solid
- Analytical purity: 1,3 Cyclohexane Dione >97% W/W
- Impurities (identity and concentrations): Sodium Chloride 1%W/W Maximum
Water 0.5%W/W Maximum
- Composition of test material, percentage of components: 1,3 Cyclohexane Dione 99.2% W/W
Sodium Chloride 0.25%W/W
Water 0.4%W/W

- Purity test date: 18 November 2009
- Lot/batch No.: 184731091224
- Expiration date of the lot/batch: 18 May 2010
- Radiochemical purity (if radiolabelling): N/A
- Stability under test conditions: Stable
- Storage condition of test material: approximately 4 deg C in the dark

Results and discussion

Surface tension
Surface tension:
ca. 69.9 mN/m
Temp.:
22 °C
Conc.:
1.01 g/L

Any other information on results incl. tables

Results

Calibration factor ()

The readings, temperatures and the corresponding calibration factors for glass double-distilled water are shown in the following table:

Table 7.4.1

Reading (mN/m)

Temperature (ºC)

Literature Value (mN/m)

Calibration Factor

72.5

21.8

72.44

0.999

72.5

21.8

72.44

0.999

72.5

21.8

72.44

0.999

72.5

22.0

72.41

0.999

72.5

22.0

72.41

0.999

72.5

22.0

72.41

0.999

Mean Calibration Factor = 0.999

Sample solution readings

The readings, times and temperatures for the sample solution are shown in the following table:

Table 7.3

Time (mins)

Reading (mN/m)

Temperature (ºC)

70

70.0

21.8

80

70.0

21.8

100

70.0

21.8

110

70.0

22.0

125

70.0

22.0

Mean reading:70.0 mN/m
Surface tension=reading x calibration factor
=70.0 x 0.999
=69.9 mN/m
Temperature:22.0 ± 0.5°C
pH of sample solution:3.8

Applicant's summary and conclusion

Conclusions:
The Surface Tension of a 1.01 g/l solution of the test material has been determined to be 69.9 mN/m @ 22.0 +/- 0.5 Deg C. The test material is considered not to be a surface active material.
Executive summary:

Surface Tension.  69.9 mN/m (1.01 g/l solution) at 22.0 ± 0.5°C, using a ring method based on ISO 304, Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008. The test material is considered not to be a surface-active material.