bis(diethylamino)-N,N-diethylmethaniminium chloride

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

April 3, 2003 to May 20, 2003

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

GLP compliance:

yes

Remarks:

OECD GLP

Type of method:

ring method

Key result

Surface tension:

>= 66 - <= 66.2 mN/m

Temp.:

22 °C

Conc.:

1 007 mg/L

Method accuracy was determined by measuring the surface tensions of the reference substances water and 2-propanol; the percent deviations of the observed surface tensions from the reported values were -2 % and 11 % respectively. The surface tension results for the test material were adjusted for the deviation (bias) observed for water, using the calibration factor.

Duplicate Test Solutions were prepared at test material concentrations of 0.993 mg/mL and 1.021 mg/mL for an average concentration of 1.007 ± 0.014 mg/mL. The observed average bias-adjusted surface tension of the test material Test Solutions (66.1 ± 0.1 mN/m) was slightly lower than that for pure water (72.3 mN/m), indicating that the test material was slightly ‘surface-active’ but would not be classed as a surfactant. The observed surface tensions of the Test Solutions were acceptably stable during the course of 5 replicate measurements, as indicated by the relative standard deviations (RSD), which were not greater than 0.1 % (for the replicate measurements).

Therefore, the observed average bias-adjusted surface tension of duplicate aqueous test material Test Solutions, with an average concentration of 1.007 ± 0.014 mg/mL, was 66.1 ± 0.1 mN/m at 22 ± 1 °C.

Conclusions:

Under the conditions of this study the the surface tension of the test material solutions with an average concentration of 1.007 ± 0.014 mg/mL, was 66.1 ± 0.1 mN/m at 22 ± 1 °C.

Executive summary:

The surface tension of the test material was investigated in accordance with the standardises guidelines OECD 115, under GLP conditions. 

In short, the surface tensions of duplicate aqueous Test Solutions of the Test Substance were determined by measuring the force required to remove a platinum ring from the solution surface.

During the study, duplicate Test Solutions were prepared at test material concentrations of 0.993 mg/mL and 1.021 mg/mL for an average concentration of 1.007 ± 0.014 mg/mL. The observed average bias-adjusted surface tension of the test material Test Solutions (66.1 ± 0.1 mN/m) was slightly lower than that for pure water (72.3 mN/m), indicating that the test material was slightly ‘surface-active’ but would not be classed as a surfactant. The observed surface tensions of the Test Solutions were acceptably stable during the course of 5 replicate measurements, as indicated by the relative standard deviations (RSD), which were not greater than 0.1 % (for the replicate measurements).

Under the conditions of this study the the surface tension of the test material solutions with an average concentration of 1.007 ± 0.014 mg/mL, was 66.1 ± 0.1 mN/m at 22 ± 1 °C.

Description of key information

Under the conditions of this study the the surface tension of the test material solutions with an average concentration of 1.007 ± 0.014 mg/mL, was 66.1 ± 0.1 mN/m at 22 ± 1 °C.

Key value for chemical safety assessment

Surface tension:

66

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

1 007

Additional information

The surface tension of the test material was investigated in accordance with the standardises guidelines OECD 115, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Duplicate Test Solutions were prepared at test material concentrations of 0.993 mg/mL and 1.021 mg/mL for an average concentration of 1.007 ± 0.014 mg/mL. The observed average bias-adjusted surface tension of the test material Test Solutions (66.1 ± 0.1 mN/m) was slightly lower than that for pure water (72.3 mN/m), indicating that the test material was slightly ‘surface-active’ but would not be classed as a surfactant. The observed surface tensions of the Test Solutions were acceptably stable during the course of 5 replicate measurements, as indicated by the relative standard deviations (RSD), which were not greater than 0.1 % (for the replicate measurements).

Under the conditions of this study the the surface tension of the test material solutions with an average concentration of 1.007 ± 0.014 mg/mL, was 66.1 ± 0.1 mN/m at 22 ± 1 °C.