Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Between 04 June 2009 and 17 August 2009

Reliability:

1 (reliable without restriction)

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.

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

yes

Remarks:

The surface tension result was not corrected using the Harkins-Jordan correction table as correction is not applicable to apparatus used and has not affected the integrity of the study.

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of inspection: 19/08/2008 Date of Signature: 04/03/2009

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

EC Number:

935-853-6

IUPAC Name:

Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

Constituent 2

Reference substance name:

Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane

IUPAC Name:

Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane

Details on test material:

- Name of test material (as cited in study report): Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane
- Substance type: Multiconstituent
- Physical state: clear extremely pale yellow liquid
- Analytical purity: 80 - 95%
- Lot/batch No.: 200901317-17
- Stability under test conditions : stable
- Storage condition of test material : approximately 4°C in the dark

Results and discussion

Surface tension

Surface tension:

58.6 mN/m

Temp.:

21.5 °C

Conc.:

0.168 g/L

Any other information on results incl. tables

Results:

Sample solution concentration:

The mean peak areas relating to the standard and sample solutions are shown in the following tables:

Table 1– Peak 1

Solution	MeanArea
Standard 26.2 mg/l	768.175
Standard 26.1 mg/l	767.873
Matrix blank	none detected
Pre-Reading Sample A	948.430
Pre-Reading Sample B	947.788
Post-Reading Sample A	868.807
Post-Reading Sample B	870.598
Pre-reading mean sample solution concentration = 0.646 g/l Post-reading mean sample solution concentration = 0.592 g/l Overall mean sample solution concentration = 0.619 g/l

 

Table 2– Peak 2

Solution	MeanArea
Standard 26.2 mg/l	27.022
Standard 26.1 mg/l	26.963
Matrix blank	none detected
Pre-Reading Sample A	26.251
Pre-Reading Sample B	25.997
Post-Reading Sample A	24.822
Post-Reading Sample B	24.419
Pre-reading mean sample solution concentration = 0.506 g/l Post-reading mean sample solution concentration = 0.477 g/l Overall mean sample solution concentration = 0.492 g/l

 

Table 3– Peak 3

Solution	MeanArea
Standard 26.2 mg/l	129.711
Standard 26.1 mg/l	129.871
Matrix blank	none detected
Pre-Reading Sample A	47.737
Pre-Reading Sample B	47.610
Post-Reading Sample A	35.457
Post-Reading Sample B	35.539
Pre-reading mean sample solution concentration = 0.192 g/l Post-reading mean sample solution concentration = 0.143 g/l Overall mean sample solution concentration = 0.168 g/l

 Calibration factor (f)

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

Table 4.

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.5	21.6	72.472	1.000
72.5	21.6	72.472	1.000
72.5	21.6	72.472	1.000
72.5	21.6	72.472	1.000
72.5	21.6	72.472	1.000
72.5	21.6	72.472	1.000
Mean Calibration Factor = 1.000

 

Sample solution readings

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

Table 5.

Time (mins)	Reading (mN/m)	Temperature (ºC)
70	58.5	21.6
80	58.5	21.6
90	59.0	21.6
105	58.5	21.6
115	58.5	21.6

Mean reading                 :   58.6 mN/m
Surface tension              = reading x calibration factor
                                    = 58.6 x 1.000
                                    = 58.6 mN/m
Temperature                  :   21.5 ± 0.5ºC
pH of sample solution     :   6.8

Applicant's summary and conclusion

Conclusions:

The surface tension of a solution of test material has been determined to be 58.6 mN/m at 21.5 ± 0.5°C.

Executive summary:

Method: The determination was carried out using a White Electrical Institute interfacial tension balance and a procedure based on the ISO 304 ring method. With the exception of the following deviation, the experintal procedure used complied with that specified in Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008.

The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m); this is as a result of the reduced ring dimensions.

This deviation has been considered not to have affected the integrity of the study.

Results:

Mean reading                 :   58.6 mN/m
Surface tension               = reading x calibration factor
                                      = 58.6 x 1.000
                                      = 58.6 mN/m

Conclusion:

The surface tension of a solution of test material has been determined to be 58.6 mN/m at 21.5 ± 0.5°C. The test material is considered to be a surface-active material as defined by the method guideline, although no surface active properties were observed within a two phase water/n-octanol system whilst under investigation. The sample solution concentrations on analysis were as detailed in the following table:

Peak	Attributed to:	Equivalent Test Material Concentration (g/l)
1	2 x bis(epoxyethyl) benzene components	0.619
2	(ethylphenyl) oxirane component	0.492
3	(ethylphenyl) oxirane component	0.168