Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental start date 14 September 2018, Experimental completion date 09 November 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method

Test material

1
Chemical structure
Reference substance name:
2-bromo-6-(4-methylbenzoyl)pyridine
EC Number:
618-079-0
Cas Number:
87848-95-1
Molecular formula:
C13H10BrNO
IUPAC Name:
2-bromo-6-(4-methylbenzoyl)pyridine

Results and discussion

Surface tension
Key result
Surface tension:
72.5 mN/m
Temp.:
20 °C
Conc.:
5.5 mg/L

Any other information on results incl. tables

Test temperature: 20°C

Solution concentration: 90% saturated (approximately 5.5 mg/L, based on the measured water solubility value of 6.1 mg/L (Section 4.5)

Solution age: Prepared immediately before measurement

Initial values were obtained as soon as possible after transfer to the measurement vessel.

Time (minutes)     Surface tension (mN/m) 
Measured  Calibration corrected
A B A B
0 73.5 73.5 73.0 73.0
5 73.5 73.5 73.0 73.0
10 73.5 73.5 73.0 73.0
15 73.5 73.5 73.0 73.0
20 73.5 73.5 73.0 73.0
25 73.5 73.5 73.0 73.0
30 73.5 73.5 73.0 73.0

Overall mean calibration corrected surface tension = 73.0 mN/m

Harkins-Jordan* corrected value = 72.5 mN/m

*HARKINS, W.D. and JORDAN, H.F., J. Amer. Chem. Soc. 52, 1751 (1930).

Applicant's summary and conclusion

Conclusions:
The surface tension of a 90% saturated aqueous solution of 2-Bromo-6-(4-toluoyl)pyridine was found to be 72.5 mN/m. As the result was greater than 60 mN/m, the test item was not considered to be surface active.