Calcium bis[(Z)-N-methyl-N-(1-oxo-9-octadecenyl)aminoacetate]

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

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

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: SOAP005-2
- Expiration date of the lot/batch: 15 October 2022


STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Ambient, stored under nitrogen in a desiccator

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: Following receipt of the test item, it was found that the material readily absorbed moisture in the parent container. Consequently, on advice from the Sponsor, a sub-sample was dried overnight at 100°C and then stored in a desiccator under a headspace of nitrogen.

Surface tension:

33.5 mN/m

Temp.:

20 °C

Conc.:

90 vol%

The measurements were conducted immediately after the final test solution preparation.

Table 1. Results of the surface tension test with the test item.

Time	Surface tension (mN/m)
(minutes)	Measured		Calibration corrected
	A	B	A	B
0	41.0	41.0	41.5	41.5
5	38.0	38.0	38.0	38.0
10	36.5	36.5	36.5	36.5
15	37.0	36.5	37.0	36.5
20	36.5	36.5	36.5	36.5
25	36.5	36.5	36.5	36.5
30	36.5	36.5	36.5	36.5

                                                 

From the measurements, it was observed that there was an initial decrease in surface tension readings. The final surface tension result was taken from the measurements between 10 and 30 minutes.

Mean calibration corrected surface tension = 36.5 mN/m

Harkins-Jordan corrected value = 33.5 mN/m

Conclusions:

The surface tension of calcium bis[(Z)-N-methyl-N-(1-oxo-9-octadecenyl) aminoacetate] was determined to be 33.5 mN/m. The test item was considered to be surface active.

Executive summary:

A study to determine the surface tension of calcium bis[(Z)-N-methyl-N-(1-oxo-9-octadecenyl) aminoacetate] was conducted according to the OECD 115 guideline (Dunning 2018). The surface tension was determined at 20°C with a surface tension torsion balance using the OECD harmonised ring method.

The surface tension of a 90% saturated solution of the test item was determined to be 33.5 mN/m. As the result was less than 60 mN/m, the test item was considered to be surface active.

The study is GLP-compliant and was conducted according to the standard guideline, therefore is considered reliable without restrictions and suitable as a key study for this endpoint.

Description of key information

The test item is considered to be surface active.

The surface tension of the test item was determined to be 33.5 mN/m.

Key value for chemical safety assessment

Surface tension:

33.5

Additional information

The surface tension of Calcium bis[(Z)-N-methyl-N-(1-oxo-9-octadecenyl) aminoacetate] was determined in a study according to the OECD 115 guideline (Dunning 2018). The surface tension was determined at 20°C with a surface tension torsion balance using the OECD harmonised ring method.

The surface tension of a 90% saturated solution of the test item was determined to be 33.5 mN/m. As the result was less than 60 mN/m, the test item was considered to be surface active.

The study is GLP-compliant and was conducted according to the standard guideline, therefore is considered relaible without restrictions and suitable as a key study for this endpoint.