diethyl 1-(2,4-dichlorophenyl)-5-methyl-4,5-dihydro-1H-pyrazole-3,5-dicarboxylate

Surface tension

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

29.04.2015 - 05.05.2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

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:

Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Mainzer Straße 80, D65189, Wiesbaden

Type of method:

OECD harmonised ring method

Surface tension:

62.9 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Individual Results of the Measurement of the Surface Tension

The surface tension values of the two aqueous solutions of the test item were determined.

The measurement was carried out at 20 °C ± 0.5 °C. A correction factor (Harkins & Jordan) is included. The age of the test solutions at the beginning of the measurement was 25 hours 20 minutes for the first test solution and 25 hours 56 minutes for the second test solution. The age of the test solution is defined as the period of time from the preparation of the solution to the recording of the surface tension value.

  Surface tension of Mefenpyr-diethyl (AE F107892), pure substance; measured data

	Experiment 1		Experiment 2
	Time [s]	σM[mN/m]	Time [s]	σM[mN/m]
1. measurement	74.1	61.87	74.2	62.14
2. measurement	118.5	61.66	120.2	61.95
3. measurement	162.6	61.61	164.5	61.87
4. measurement	207.2	61.54	208.8	61.87
5. measurement	252.0	61.50	252.2	61.81
6. measurement	295.4	61.48	296.8	61.81
7. measurement	339.7	61.48	341.8	61.78
8. measurement	386.9	61.45	387.1	61.75
9. measurement	430.4	61.46	431.1	61.77
10. measurement	476.1	61.45	474.5	61.75
Mean σM[mN/m]		61.55		61.85

Mean (experiments 1 and 2): σ_mean= 61.70 mN/m

Standard deviation: 0.21 mN/m

Relative standard deviation: 0.34%

The mean value, multiplied by the calibration factor (F = 1.0192) results in:

σ = σ_mean· F = 62.9 mN/m

Reference 2

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

19.01.2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

HESSISCHES MINISTERIUM FÜR UMWELT, LANDWIRTSCHAFT UND FORSTEN

Type of method:

OECD harmonised ring method

Surface tension:

63.5 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Concentration: see details on methods.

Individual results:

Measurement	Experiment 1		Experiment 2
	Time/sec	W/mN/m	Time/sec	W/mN/m
1	79.0	63.48	78.0	62.51
2	125.7	63.39	125.0	62.41
3	172.3	63.31	173.4	62.38
4	222.2	63.30	221.3	62.36
5	269.8	63.27	270.0	62.35
6	318.2	63.26	318.7	62.31
7	365.7	63.24	366.2	62.31
8	418.6	63.21	415.1	62.31
9	466.3	63.24	462.5	62.31
10	513.7	63.21	510.8	62.30
Mean surface tension mN/m		63.29		62.36

Mean (experiments 1 to 2): 62.83 mN/m

Standard deviation: 0.66 mN/m (relative s.d.: 1.05%)

The mean value, multiplied by the calibration factor 1.0103, yields to the value of 63.47 mN/m.

Reference 3

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19.03.2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

HESSISCHES MINISTERIUM FÜR UMWELT, LANDWIRTSCHAFT UND FORSTEN

Type of method:

OECD harmonised ring method

Surface tension:

56.2 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Concentration: see details on methods.

Individual results:

Measurement	Experiment 1		Experiment 2
	Time/sec	W/mN/m	Time/sec	W/mN/m
1	73.3	56.18	74.3	55.03
2	119.7	56.14	119.5	55.03
3	165.8	56.17	165.0	55.05
4	212.6	56.13	211.3	55.07
5	261.0	56.10	256.6	55.09
6	307.9	56.04	302.9	55.10
7	354.1	56.12	349.5	55.10
8	400.2	56.14	396.0	55.12
9	446.6	56.16	443.3	55.12
10	492.4	56.22	490.1	55.15
Mean surface tension mN/m		56.14		55.09

Mean (experiments 1 to 2): 55.62 mN/m

Standard deviation: 0.74 mN/m (relative s.d.: 1.3%)

The mean value, multiplied by the calibration factor 1.0100, yields to the value of 56.17 mN/m.

Description of key information

The determination of the surface tension was carried out according to the ring tensiometer method (OECD Guideline 115 (EU Method A.5). The surface tension of pure test substance was determined to be 62.9 mN/m at 20 °C at a concentration corresponding to 90% of the solubility in water and the surface tension of technical grade active substance was determined to be: 56.2 mN/m at 20 °C at a concentration corresponding to 90% of the saturation concentration in water.