Trisodium 5-[[4-chloro-6-(ethylphenylamino)-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(4-methyl-2-sulphonatophenyl)azo]naphthalene-2,7-disulphonate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 February - 1 March 2019

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:

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: at dry and dark place between 5 - 30 degCelsius
- Stability under test conditions: stable
- Solubility and stability of the test substance in the solvent/vehicle: approx. 129 g/L in water

Key result

Surface tension:

54.24 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Conclusions:

The surface tension of a 1 g/L aqueous solution of the test item Reactive Red 45:1 was determined to be 54.24 mN/m (standard deviation +/- 0.05 mN/m) at 20 degC.
Considering that distilled water has a surface tension of 72.75 mN/m at 20 degC and the test item showed a surface tension below 60 mN/m under the conditions of this referring method, the test item should be regarded as being a surface-active material.

Executive summary:

The surface tension of a 1 g/L aqueous solution of the test item Reactive Red 45:1 was determined according to OECD Guideline No. 115 (1995) and Council Regulation (EC) No. 440/2008 Method A.5 with the OECD harmonized ring method.

The determination was carried out with a tensiometer in ten successive measurements with a standard deviation ≤0.05 mN/m at a temperature of 20 °C.

The surface tension of a 1 g/L aqueous solution of the test item Reactive Red 45:1 was determined to be: 54.24 mN/m(standard deviation ± 0.05mN/m) at 20 °C.

Considering that distilled water has a surface tension of 72.75 mN/m at 20 °C and the test item showed a surface tension below 60 mN/m under the conditions of this referring method, the test item should be regarded as being a surface-active material.

Description of key information

The surface tension of a 1 g/L aqueous solution of the test item Reactive Red 45:1 was determined to be 54.24 mN/m at 20°C.

Key value for chemical safety assessment

Surface tension:

54.24

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

1 000

Additional information

The surface tension of a 1 g/L aqueous solution of the test item Reactive Red 45:1 was determined to be 54.24 mN/m (standard deviation +/- 0.05 mN/m) at 20°C.

Considering that distilled water has a surface tension of 72.75 mN/m at 20°C and the test item showed a surface tension below 60 mN/m under the conditions of this referring method, the test item should be regarded as being a surface-active material.