2-Propenoic acid, 2-methyl-, hydroxybutyl ester

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental Starting Date: 02 November 2012 Experimental Completion Date: 07 November 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

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. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

not specified

Remarks:

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. Conducted under GLP conditions.

GLP compliance:

yes

Type of method:

other: EXAMPLE: CHOOSE CORRECT METHOD FROM DROPDOWN LIST OR CHOOSE OTHER AND ADD METHOD USED IN THIS COMMENT SECTION. EXAMPLE: Ring method

Test material

Test material information

Constituent 1

Test material form:

liquid

Specific details on test material used for the study:

Identification: Hydroxybutyl Methacrylate
Description: Clear colorless liquid
Sponsors Lot number: 57821
Sigma-Aldrich Lot number: MKBH4325V
Purity: 98.5%
Expiry / Retest Date: 02 October 2013
Storage Conditions: Approximately 4 °C, in the dark

Results and discussion

Surface tension

Surface tension 1

Surface tension:

57 mN/m

Temp.:

21.8 °C

Conc.:

1.01 g/L

Remarks on result:

other: Sample A

Surface tension 2

Surface tension:

57.1 mN/m

Temp.:

21.6 °C

Conc.:

1.02 g/L

Remarks on result:

other: Sample B

Any other information on results incl. tables

Results

Calibration Factor (Φ_b)

The readings, temperatures and the corresponding calibration factors for purified water are shown in the following tables:

 

Table 3.3 – Sample A

 

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.5	21.8	72.44	0.999
725	21.8	72.44	0.999
72.0	21.8	72.44	1.006
72.5	21.8	72.44	0.999
72.0	21.8	72.44	1.006
72.0	21.8	72.44	1.006
72.0	21.8	72.44	1.006
Mean Calibration Factor = 1.003

 

Table 3.4 – Sample B

 

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
72.5	21.6	72.47	1.000
73.0	21.6	72.47	0.993
72.5	21.6	72.47	1.000
72.5	21.6	72.47	1.000
72.5	21.6	72.47	1.000
73.0	21.6	72.47	0.993
73.0	21.6	72.47	0.993
72.5	21.6	72.47	1.000
Mean Calibration Factor = 0.997

 

    

Sample Solution Readings

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

 

Table 3.5 – Sample A

 

Time (mins)	Reading (mN/m)	Temperature (ºC)
91	60.0	21.8
100	57.0	21.8
109	57.0	21.8
118	56.5	21.8
128	56.5	21.8
137	57.0	21.8
Mean sample reading (last 5 readings) = 56.8

 

Table 3.6 – Sample B

 

Time (mins)	Reading (mN/m)	Temperature (ºC)
180	61.0	21.6
189	58.0	21.6
197	57.5	21.6
208	57.5	21.6
217	57.0	21.6
226	57.5	21.6
236	57.0	21.6
Mean sample reading (last 5 readings) = 57.3

 

Surface tension:                    = reading x calibration factor
Sample A:                             = 57.0 mN/m @ 21.8 ºC
Sample B:                              = 57.1 mN/m @ 21.6 ºC
pH of sample solution:           = Sample A = 4.3
                                               = Sample B = 4.2

Applicant's summary and conclusion

Conclusions:

Please see the Conclusion within the Executive Summary section below.

Executive summary:

The determination was carried out using a White Electrical Institute Co. Ltd. torsion balance for surface and interfacial tension measurements, using a procedure designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008.

         

Conclusion

The results of the surface tension are shown in the following table:

 

Table 3.7

 

Concentration (g/L)	Surface Tension (mN/m)	Temperature (ºC)
1.01	57.0	21.8
1.02	57.1	21.6

 

The test item was considered to be surface-active.