thiacloprid (ISO);(Z)-3-(6-chloro-3-pyridylmethyl)-1,3-thiazolidin-2-ylidenecyanamide;{(2Z)-3-[(6-chloropyridin-3-yl)methyl]-1,3-thiazolidin-2-ylidene}cyanamide

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:

3-4 Jul 2013

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:

72 mN/m

Temp.:

20 °C

Conc.:

150 mg/L

Remarks on result:

other: mean value of measured surface tension from two solutions with concentrations 148 mg/L and 152 mg/L (determined by HPLC)

Individual results of the measurement of the surface tension:

The surface tension values of the two diluted 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 25.25 hours for the first test solution and 25.75 hours 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.

Measured data:

	Experiment 1		Experiment 2
	Time [s]	σM [mN/m]	Time [s]	σM [mN/m]
1. measurement	78.6	70.65	79.0	70.85
2. measurement	123.7	70.50	121.8	70.74
3. measurement	167.4	70.51	166.6	70.67
4. measurement	210.7	70.35	211.3	70.65
5. measurement	256.5	70.28	255.0	70.58
6. measurement	301.8	70.26	298.7	70.55
7. measurement	346.3	70.22	342.0	70.55
8. measurement	390.9	70.22	387.5	70.52
9. measurement	436.2	70.22	433.0	70.50
10. measurement	481.5	70.20	478.0	70.51
Mean  σM [mN/m]	70.34		70.61

Mean (experiments 1 to 2): σ_mean = 70.48 mN/m

Standard deviation: 0.2 mN/m

Relative standard deviation: 0.3 %

The mean value, multiplied by the calibration factor (F= 1.0212) results in:

σ =  σ_meanx F = 72.0 mN/m

Reference 2

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14-15 Nov 2007

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:

69.7 mN/m

Temp.:

20 °C

Remarks on result:

other: concentration 90% of 185 mg/L (water solubility data known that time)

Description of key information

72 mN/m at 20 °C, concentration 150 mg/L (ca. 90% saturated concentration in water) (OECD 115, EU A.5, OECD harmonised ring method).

The substance is not surface active.

Key value for chemical safety assessment

Surface tension:

72

in mN/m at 20°C and concentration in mg/L:

150

Additional information

In an earlier experiment (OECD 115, harmonised ring method), resulting in the value of 69.7 mN/m at 20 °C, concentration ca. 170 mg/L, it was confirmed that the substance was not surface active.