Cyclohexane-1,3-dione

Surface tension

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

Test material information

Constituent 1

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.