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Diss Factsheets

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental Starting Date: 08 August 2012 Experimental Completion Date: 23 August 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 guidelineopen allclose all
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
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
Principles of method if other than guideline:
The determination was carried out using a White Electrical Institute Co. Ltd. torsion balance for surface and interfacial tension measurements using a procedure based on ISO 304 and designed to be compatible with that specified in Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.

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 deviation has been considered not to have affected the integrity of the study.
GLP compliance:
yes
Type of method:
ring method

Test material

Constituent 1
Reference substance name:
BMS-528233-01
IUPAC Name:
BMS-528233-01
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
Identification: BMS-528233-01
Description: White powder
BMS Batch Number: 2C80150N
Vendor Batch Number LTBB2S1005
Structure: Please see Attachment 1 of this Summary
Molecular Formula: C17H27NO5
Molecular Weight: 325.41
Purity: >100 %
Expiry Date: 31 January 2015
Storage Conditions: Room temperature, in the dark

Results and discussion

Surface tension
Surface tension:
60.5 mN/m
Temp.:
20.5 °C
Remarks on result:
other: The surface tension of a 1.0 g/L solution of test item in water has been determined to be 60.5 mN/m at 20.5 ± 0.5 °C. The test item was considered not to be surface-active.

Any other information on results incl. tables

Results

Calibration factor b)

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

 

Table 3.5– Sample 1

 

Reading (mN/m)

Temperature (ºC)

Literature Value (mN/m)

Calibration Factor

73.0

20.6

72.63

0.995

73.0

20.4

72.66

0.995

73.0

20.6

72.63

0.995

73.0

20.6

72.63

0.995

73.0

20.6

72.63

0.995

73.0

20.4

72.66

0.995

Mean Calibration Factor = 0.995

 


 

Table 3.6– Sample 2

Reading (mN/m)

Temperature (ºC)

Literature Value (mN/m)

Calibration Factor

73.0

20.4

72.66

0.995

73.0

20.4

72.66

0.995

73.0

20.4

72.66

0.995

73.0

20.4

72.66

0.995

73.0

20.6

72.63

0.995

73.0

20.6

72.63

0.995

Mean Calibration Factor = 0.995

 

 

Sample solution readings

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

 

Table 3.7 – Sample 1

Time (mins)

Reading (mN/m)

Temperature (ºC)

64

61.0

20.4

79

61.0

20.4

87

61.0

20.6

95

61.0

20.6

101

61.0

20.6

Mean sample reading = 61.0

 

Table 3.8 – Sample 2

Time (mins)

Reading (mN/m)

Temperature (ºC)

1084

60.5

20.4

1097

60.5

20.4

1112

60.5

20.4

1120

60.5

20.6

1135

60.5

20.6

Mean sample reading = 60.5

 


 

Surface tension                     : reading x calibration factor
Sample 1                               : 60.7 mN/m
Sample 2                               : 60.2 mN/m
Mean                                    : 60.5 mN/m
Temperature                         : 20.5 ± 0.5 ºC
pH of sample solution            : Sample 1 = 3.1
                                                Sample 2 = 3.0

 

 

Applicant's summary and conclusion

Conclusions:
Please see the Conclusion section of the report within the Executive Summary 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 based on ISO 304 and designed to be compatible with that specified in Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.

Conclusion

The surface tension of a 1.0 g/L solution of test item in water has been determined to be 60.5 mN/m at 20.5 ± 0.5 °C. The test item was considered not to be surface-active.