3,7-dimethylnona-2,6-dienenitrile

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 08 December 2011 and 27 January 2012.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study performed according to GLP and OECD Guideline.

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Specific details on test material used for the study:

Sponsor's identification :Lemonile
Description :clear colourless liquid
Purity :99.9%
Batch number :PE00027352
Date received :03 October 2011
Expiry date :26 October 2013
Storage conditions :room temperature in the dark

Surface tension:

62.3 mN/m

Temp.:

19 °C

Conc.:

0.037 g/L

Remarks on result:

other: The test item was considered not to be surface-active.

  Sample solution concentration

The mean peak areas relating to the standard and sample solutions are shown in the following table:

Solution	MeanArea
Standard 11.6 mg/l	6.4655 x 10^6
Standard 10.1 mg/l	5.6576 x 10^6
Matrix blank	none detected
Sample A1	1.0311 x 10^7
Sample A2	1.0333 x 10^7
Mean sample solution concentration = 3.69 x 10^-2g/l

 Calibration factor (f)

The readings, temperatures and the corresponding calibration factors for glass double-distilled water are shown in the following table:

Reading (mN/m)	Temperature (ºC)	Literature Value (mN/m)	Calibration Factor
73.0	19.0	72.87	0.998
73.0	19.0	72.87	0.998
72.5	19.0	72.87	1.005
73.0	19.0	72.87	0.998
72.5	19.0	72.87	1.005
72.5	19.0	72.87	1.005
Mean Calibration Factor = 1.002

Sample solution readings

The readings, times and temperatures for the sample solution are shown in the following table:

Time (mins)	Reading (mN/m)	Temperature (ºC)
115	62.0	19.0
120	62.0	19.0
130	62.5	19.0
138	62.5	19.0
145	62.5	19.0

Mean reading:    62.2 mN/m
Surface tension:  = reading x calibration factor
                          = 62.2 x 1.002
                          = 62.3 mN/m
Temperature:    19.0 ± 0.5ºC
pH of sample solution:  6.3

Validation

The linearity of the detector response with respect to concentration was assessed over the nominal concentration range of 1 to 58 mg/l. This was satisfactory with a correlation coefficient of 0.999 being obtained

Discussion

Substances showing a surface tension lower than 60 mN/m should be regarded as being surface-active

Conclusions:

The surface tension of a 90% saturated aqueous solution (3.69 x 10-2 g/l, determined by HPLC) of test item has been determined to be 62.3 mN/m at 19.0 ± 0.5°C. The test item was considered not to be surface-active

Description of key information

The surface tension of a 90% saturated aqueous solution (3.69 x 10-2 g/l, determined by HPLC) of test item has been determined to be 62.3 mN/m at 19.0 ± 0.5°C.  The test item was considered not to be surface-active (OECD 115)

Key value for chemical safety assessment

Surface tension:

62.3

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

0.037

Additional information

Surface Tension of Aqueous Solutions. 62.3 mN/min a 90% saturated aqueous solution at 19.0 ± 0.5°C (3.69 g/l, determined by HPLC), using a ringthod based on ISO 304, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered not to be surface-active.