Amidation products of C16-18 (even numbered), C18 unsaturated fatty acids esters with 1,1'-iminodipropan-2-ol

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

22 June 2016 to 14 October 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.5: “Surface Tension”, Official Journal of the European Union no. L142, May 31, 2008.

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 115: "Surface Tension of Aqueous Solutions", July 27, 1995.

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Specific details on test material used for the study:

Batch: RC-1045Study specific test item informationPurity/composition correction factor: No correction factor requiredChemical name (IUPAC), synonym or trade name: Amides, tallow, N,N-bis(2-hydroxypropyl)CAS Number: 1454803-04-3Test item handling: No specific handling conditions required

Surface tension:

57.2 mN/m

Temp.:

20 °C

Conc.:

90 vol%

Surface tension of the test item

Measurement	Time passed after transfer test solution to test vessel [minutes]	Surface tension [mN/m]
		Individual	Mean	Mean multiplied by Φband Harkins-Jordan corrected value
1 2 3 4 5	18 19 20 21 22	58.6 58.9 58.9 58.8 59.0	58.8	57.2

 

Conclusions:

The surface tension of a test solution at 90% of the test item saturation solubility in water and at 20°C was 57.2 mN/m. According to this, the test item is considered to be surface active.

Executive summary:

The purpose of the study was to determine the physico-chemical properties for MLA-3202.

 

The surface tension of the test item was determined using the OECD harmonized ring method, in accordance with the following guidelines:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.5: “Surface Tension”, Official Journal of the European Union no. L142, May 31, 2008.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 115: "Surface Tension of Aqueous Solutions", July 27, 1995.

 

The surface tension of the test item was determined using the OECD harmonized ring method. The system consists of the following elements: model K6 tensiometer (Krüss, Hamburg, Germany), platinum-iridium ring with a wire radius of 0.185 mm and a ring radius of 9.545 mm and a cylindrical glass vessel with an inside diameter of 45 mm.

An aliquot of 201.4 mg of the test item was stirred with 200 mL double distilled water at 20.1 ± 0.3°C for 18 hours. After the stirring period, a sample of the suspension was centrifuged at 3500 g and 20°C for 5 minutes. In order to remove test item particles floating on the surface of the test sample, the solution was additionally filtered through a 0.45 μm Spartan 30/0.45 RC filter (Whatman, Dassel, Germany). Thereafter, 90 mL of the aqueous phase was mixed with 10 mL double distilled water to obtain the test solution at 90% of the test item saturation solubility in water.

 

The test solution at 90% of the test item saturation solubility in water was filtered through a 0.45 μm Spartan 30/0.45 RC filter (Whatman, Dassel, Germany). The cylindrical glass vessel was filled with water or test solution and placed in a vessel holder on a mobile sample table.

The time between preparation of the test solution and transferring it to the vessel was 2 minutes. The mobile sample table was raised until the ring was immersed below the surface of the solution. The table was subsequently lowered until the ring was in contact with the liquid surface. The surface tension of the test item was determined using the tensiometer.

Five measurements were performed until a constant value on the surface tension was reached (< 0.5 mN/m). The time passed since the solution was transferred to the measurement vessel was measured for each measurement.

The test was performed at 20.0 ± 0.5°C.

 

The OECD harmonized ring method was applied for the determination of the surface tension of Amides, tallow, N,N-bis(2-hydroxypropyl).

 

The surface tension of a test solution at 90% of the test item saturation solubility in water and at 20°C was 57.2 mN/m. According to this, the test item is considered to be surface active.

Description of key information

Key value determined in a GLP accredited laboratory study using the OECD harmonized ring method, in accordance with the EU Method A.5 and OECD Guideline 115.

Key value for chemical safety assessment

Surface tension:

57.2

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

201.4

Additional information

The surface tension of the test item was determined using the OECD harmonized ring method. The system consists of the following elements: model K6 tensiometer (Krüss, Hamburg, Germany), platinum-iridium ring with a wire radius of 0.185 mm and a ring radius of 9.545 mm and a cylindrical glass vessel with an inside diameter of 45 mm.

An aliquot of 201.4 mg of the test item was stirred with 200 mL double distilled water at 20.1 ± 0.3°C for 18 hours. After the stirring period, a sample of the suspension was centrifuged at 3500 g and 20°C for 5 minutes. In order to remove test item particles floating on the surface of the test sample, the solution was additionally filtered through a 0.45 μm Spartan 30/0.45 RC filter (Whatman, Dassel, Germany). Thereafter, 90 mL of the aqueous phase was mixed with 10 mL double distilled water to obtain the test solution at 90% of the test item saturation solubility in water.

 

The test solution at 90% of the test item saturation solubility in water was filtered through a 0.45 μm Spartan 30/0.45 RC filter (Whatman, Dassel, Germany). The cylindrical glass vessel was filled with water or test solution and placed in a vessel holder on a mobile sample table.

The time between preparation of the test solution and transferring it to the vessel was 2 minutes. The mobile sample table was raised until the ring was immersed below the surface of the solution. The table was subsequently lowered until the ring was in contact with the liquid surface. The surface tension of the test item was determined using the tensiometer.

Five measurements were performed until a constant value on the surface tension was reached (< 0.5 mN/m). The time passed since the solution was transferred to the measurement vessel was measured for each measurement.

The test was performed at 20.0 ± 0.5°C.

 

The OECD harmonized ring method was applied for the determination of the surface tension of Amides, tallow, N,N-bis(2-hydroxypropyl).

 

The surface tension of a test solution at 90% of the test item saturation solubility in water and at 20°C was 57.2 mN/m. According to this, the test item is considered to be surface active.