Reaction mass of divinylbenzene and ethylstyrene

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 December 2009 to 09 February 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

yes

Remarks:

The surface tension result was not corrected using the Harkins-Jordan correction table

GLP compliance:

yes

Remarks:

Date of GLP inspection: 15 September 2009 Date of Signature on GLP certificate: 26 November 2009

Type of method:

ring method

Surface tension:

68.7 mN/m

Temp.:

20.4 °C

Conc.:

0.025 g/L

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

Solution	MeanArea
Standard 50.8 mg/L	641.903
Standard 50.6 mg/L	670.392
Sample A	1.288 x 10^3
Sample B	1.230 x 10^3
Mean sample solution concentration = 2.51 x 10^-2g/L

Calibration factor (f)

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

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.0	20.4	72.66	1.009
72.5	20.4	72.66	1.002
72.5	20.4	72.66	1.002
72.5	20.4	72.66	1.002
72.0	20.4	72.66	1.009
72.5	20.4	72.66	1.002
72.0	20.4	72.66	1.009
72.0	20.4	72.66	1.009
72.5	20.4	72.66	1.002
Mean Calibration Factor = 1.005

 

 Sample solution readings

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

Time (mins)	Reading (mN/m)	Temperature (ºC)
95	68.0	20.4
105	68.5	20.4
119	68.0	20.4
130	68.5	20.4
140	68.5	20.4
149	68.5	20.4
160	68.5	20.4
167	68.5	20.4

Mean reading              :  68.4 mN/m
Surface tension           = reading x calibration factor
                                  = 68.4 x 1.005
                                  = 68.7 mN/m
Temperature                :  20.4 ± 0.5ºC
pH of sample solution   :  7.0

Validation

The linearity of the detector response with respect to concentration was assessed over the nominal concentration range of 0 to 100 mg/L. This was satisfactory with a correlation coefficient of 0.998 being obtained. Recovery of analysis of the sample procedure was assessed and proved adequate for the test. At a nominal concentration of 10.1 mg/L, a mean percentage recovery of 77.5% was obtained (range 74.2 to 81.9%). Concentrations have been corrected for recovery of analysis.

Attachment 1 - Typical Chromatography

Conclusions:

The surface tension of a 2.51 E-2 g/L solution of test material has been determined to be 68.7 mN/m at 20.4 ± 0.5°C. The test material is considered not to be a surface-active material.

Executive summary:

Surface Tension of Aqueous Solutions. The surface tension of a 2.51E-2 g/L solution of test material has been determined to be 68.7 mN/m at 20.4 ± 0.5°C, using a ringthod based on ISO 304, Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test material is considered not to be a surface-active material.

Description of key information

The surface tension of a 0.0251 g/L solution of DVB-HP has been determined to be 68.7 mN/m at 20°C. The test material is considered not to be a surface-active material. As no surface-activity has been observed with DVB-HP, no such activity is expected with the other grades of the reaction mass of divinylbenzene and ethylstyrene.

Key value for chemical safety assessment

Surface tension:

68.7

in mN/m at 20°C and concentration in mg/L:

0.025