Reaction mass of 3-(difluoromethyl)-1-methyl-N-[(1RS,4SR,9RS)-1,2,3,4-tetrahydro-9-isopropyl-1,4-methanonaphthalen-5-yl]pyrazole-4-carboxamide and of 3-(difluoromethyl)-1-methyl-N-[(1RS,4SR,9SR)-1,2,3,4-tetrahydro-9-isopropyl-1,4-methanonaphthalen-5-yl]pyrazole-4-carboxamide; isopyrazam

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10 Jun 2008 to 12 Jun 2008

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)

Version / remarks:

1995

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

1992

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Key result

Surface tension:

63.1 mN/m

Temp.:

19.8 °C

Conc.:

90 vol%

Results

The calibration factor Φb was determined to be 1.0449 for double distilled water, see Table 1 below. Table 2 shows the individual measurements for the surface tension of the aqueous test item solution. From these, the mean and the corrected value for the given solution were calculated and also shown in Table 2. The tabulated values represent rounded results obtained from calculation using the exact raw data. Mean value from both samples: σ = 63.1 mN/m. The substance is considered not surface active.

Table 1. Determination of the calibration factor using water

Time expired         [hours:min]	Temperature         [°C]	Surface tension [mN/m]		Calibration factor       Φb
		measured	mean value calculated from the bold values g
00:30	19.6	69.7	69.67	1.0449
00:33	19.6	69.7
00:35	19.6	69.7
00:37	19.7	69.5
00:39	19.7	69.8
00:41	19.7	69.6

 

Table 2. Determination of surface tension for the test item

Time expired         [hours:min]	Temperature         [°C]	Surface tension [mN/m]
		measured	mean value calculated from the bold values (*)	mean value corrected for calibration (1)	1corrected for Harkins- Jordan ()
First sample
0:31	19.9	61.3	60.90	63.63	63.04
0:34	19.9	60.9
0:36	19.9	60.7
0:37	19.9	60.8
0:38	19.8	60.9
0:39	19.8	60.8
Second sample
0:30	19.4	61.9	60.98	63.72	63.13
0:32	19.6	61.0
0:34	19.7	60.8
0:36	19.7	60.7
0:38	19.7	60.9
0:39	19.8	60.6

Conclusions:

The average surface tension of two independent measurements was 63.1 mN/m for a 90 % aqueous solution at 19.8 °C. The substance is considered not surface active.

Executive summary:

The surface tension of the test substance was determined using the ring method in accordance with OECD TG 115 following GLP principles. The average surface tension of two independent measurements was 63.1 mN/m for a 90% aqueous solution at 19.8 °C. The substance is considered not surface active.

Description of key information

Surface tension: 63.1 mN/m for a 90 % aqueous solution at 19.8 °C, not surface active substance, OECD TG 115, ring method, Weissenfeld 2008

Key value for chemical safety assessment

Surface tension:

63.1

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

92