Benzyl-C12-14-alkyldimethylammonium chlorides

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

key study

Study period:

April, 2007

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

KL2 due to RA

Justification for type of information:

Refer to the Quaternary ammonium salts (QAS) category or section 13 of IUCLID for details on the category justification.

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)

Version / remarks:

Cited as Directive 92/69/EEC, A.5

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Key result

Surface tension:

28.27 mN/m

Temp.:

19.7 °C

Conc.:

1 g/L

CMC:  0.50 g/L for C14-chain length and 1.0 g/L for C12 -chain length

Conclusions:

Under the study conditions, the surface tension of the read across substance was determined to be 28.27 ± 0.05 mN/m (ring method)

Executive summary:

A study was conducted to determine the surface tension of the read across substance, C12-16 ADBAC (purity: 94.4%) according to OECD Guideline 115 and EU Method A.5 (ring method). Additionally, the critical micelle concentration (CMC) was determined. The determination of surface tension of an aqueous solution of 1 g/L was carried out at a temperature range of 19.7 to 19.8°C. The critical micelle concentration (CMC) was determined by measuring the surface tension of the read across substance at different concentrations. 1 g/L (total volume 100 mL), prepared in double distilled water, was used to determine the surface tension in 10 measurements. Different concentrations of the read across substance in the range of 0.02 to 5 g/L (total volume 100 mL), prepared in bi-distilled water, were applied for the determination of the critical micelle concentration. The experiment was carried out at 20 ± 0.5°C. The CMC were determined to be 0.50 g/L for C14-chain length and 1.0 g/L for C12 -chain length. Under the study conditions, the surface tension of the read across substance was determined to be 28.27 ± 0.05 mN/m (Schulze, 2007). Based on the results of the read across, a similar surface tension is expected for the test substance.

Description of key information

The surface tension (and the critical micelle concentration) was determined based on a study conducted with read across substance, C12-16 ADBAC, using the ring method according to OECD Guideline 115 and EU Method A.5 (Schulze, 2007)

Key value for chemical safety assessment

Surface tension:

28.27

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

1 000

Additional information

CMC: 0.50 g/L for C14-chain length and 1.0 g/L for C12-chain length