Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 May 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was perfomred according to guideline with one deviation that did not affect the integrity of the study.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
yes
Remarks:
Result was not corrected using the Harkins-Jordan correction table as correction was not applicalbe to the apparatus used. Instrument gave a direct reading for surface tension within +/- 0.5mN/m. This deviation did not affect the integrity of the study.
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
yes
Remarks:
Result was not corrected using the Harkins-Jordan correction table as correction was not applicalbe to the apparatus used. Instrument gave a direct reading for surface tension within +/- 0.5mN/m. This deviation did not affect the integrity of the study.
GLP compliance:
yes (incl. QA statement)
Remarks:
Issued by- The Department of Health of the Government of the United Kingdom Issue date- 2009-11-26
Type of method:
ring method

Test material

Constituent 1
Chemical structure
Reference substance name:
Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)
EC Number:
224-235-5
EC Name:
Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)
Cas Number:
4259-15-8
Molecular formula:
Too complex
IUPAC Name:
1-Hexanol, 2-ethyl-, O,O-diester with phosphorodithioic acid, zinc salt
Details on test material:
- Substance type: zinc coordination complex with alkyldithiophosphate ligands
-Analytical purity: 92 %

Results and discussion

Surface tension
Surface tension:
63.7 mN/m
Temp.:
21 °C
Conc.:
1.25 g/L
Remarks on result:
other: nominal concentration

Any other information on results incl. tables

Table 1. Determination of Calibration Factor (glass double-distilled water) 

Reading (mN/m) 

Temperature0C

Literature Value (mN/m)

Calibration Factor

72.0

21.0

72.57

1.008

72.0

21.0

72.57

1.008

72.5

21.0

72.57

1.001

72

21.0

72.57

1.008

72.5

21.0

72.57

1.001

72.0

21.0

72.57

1.008

Mean Calibration Factor = 1.006

 

  

Table 2. Test Sample Surface Tension Measurements 

Time (min)

Reading (mN/m)

 

Temperature0C

mN/m * Calibration factor

65

63.0

21.0

63.378

75

63.5

21.0

63.881

85

63.5

21.0

63.881

95

63.5

21.0

63.881

105

63.0

21.0

63.378

Mean Surface Tension (mN/m) =    63.7

pH of sample solution = 4.9

Applicant's summary and conclusion

Conclusions:
The surface tension of the substance is 63.7 mN/m at 21 deg. C. The substance is not a surface-active material.
Executive summary:

The surface tension of the substance was determined according to EU Method A.5 using the ring method based on ISO 304.

The surface tension of the substance is 63.7 mN/m at 21 degrees C. The substance is not regarded as a surface-active material according to the guideline.