Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes (incl. QA statement)
Remarks:
Hessisches Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz
Type of method:
OECD harmonised ring method

Test material

Constituent 1
Chemical structure
Reference substance name:
3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid
EC Number:
700-093-4
Cas Number:
176969-34-9
Molecular formula:
C6H6F2N2O2
IUPAC Name:
3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid

Results and discussion

Surface tension
Key result
Surface tension:
70.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: The substance is not surface active according to EU A.5

Any other information on results incl. tables

The measurement was carried out at 20 ° ±0.5 °C.
A correction factor (Harkins & Jordan) is included.
The age of the test solutions at the beginning of the measurement was 1.5 hours for the Test solution 1 and 2.5 hours for the Test solution 2. The age of the test solution is defined as the period from the preparation of the solution to the recording of the surface tension value.

Surface tension of AE 1954999, technical substance measured data

 

Experiment 1

Experiment 2

Time [s]

σM[mN/m]

Time [s]

σM[mN/m]

1. measurement

80.7

70.77

71.3

69.58

2. measurement

128.8

70.77

113.1

69.59

3. measurement

173.4

70.66

156.4

69.61

4. measurement

218.4

70.67

200.5

69.61

5. measurement

264.0

70.62

242.9

69.58

6. measurement

309.0

70.63

285.7

69.58

7. measurement

354.5

70.64

329.2

69.61

8. measurement

399.5

70.65

372.1

69.62

9. measurement

445.2

70.64

416.8

69.61

10. measurement

491.3

70.64

459.7

69.61

Mean σM[mN/m]

70.67

 

69.60

The mean value (70.14 mN/m) was multiplied by the calibration factor (F=1.0076)


Applicant's summary and conclusion