Alkali salt of substituted alkyl amino sulfonyl triazinyl amino arylamido diazo aryl sulfonyl sulfonate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2012-05-18 to 2012-05-30

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP study conducted in accordance with EU and OECD test guidelines with a valid GLP certificate.

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Key result

Surface tension:

71.5 mN/m

Temp.:

20.5 °C

Conc.:

10.09 g/L

For the calculation of the surface tension of the test item, the mean of the measured surface tension values was corrected by the calibration factor and by the Harkins-Jordan correction.

In order to describe the time dependence of the surface tension after transferring the Reactive Yellow F01-0555 solution to the measurement vessel, repeated measurements were carried out with increasing the equilibrium time.The equilibrium time for these five measurements was 330-360 sec.(see Table 1).

 

Table 1.:Time dependence of the surface tension after transferring the Reactive Yellow F01-0555 solution to the measurement vessel. Measured surface tension values and test conditions.
	Temperature (°C)	Equilibrium time (sec)	Surface tension (mN/m)
(Data were not considered for the calculation of surface tension)	19.9	318	71.0
	20.4	320	71.2
	20.5	340	71.2
	20.3	350	71.2
	20.4	360	71.2
	20.6	330	71.2
	20.6	340	71.2
Mean	20.5	-	71.2
Standard deviation	-	-	0.0
95 % confidence interval	-	-	0.0
Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

 

 

Calculation of the surface tension of WS400402

 

Calibration factor ():	1.0041
Mean of the five measured surface tension values of WS400402 ()	71.2mN/m
	71.49 mN/m
Surface tension of aqueous solution of Reactive Yellow F01-0555after correction by Harkins-Jordan(interpolated value based on the guide REACH A.5)	71.47mN/m

Conclusions:

The surface tension of the aqueous solution of Reactive Yellow F01-0555 is 71.5 mN/m.

As the surface tension value was higher than 60 mN/m,the test item is not classified as surface active substance

Executive summary:

The objective of the study was toevaluate the surface tension of Reactive Yellow F01-0555 applying the ring method. The method is based on the measurement of the force, which is necessary to exert vertically on a ring, in contact with the surface of the liquid, in order to separate it from the surface.

The determination of the surface tension was carried out using a Krüss K6 Tensiometer applying the ring method. The measured value was found to be 71.2mN/m at 20.5°C.

 

The surface tension value after correction by the Harkins-Jordan correction factor is71.47 mN/m at 20.5 °C.

As the surface tension value was higher than 60 mN/m, Reactive Yellow F01-0555 is not classified as surface active substance.

Description of key information

The surface tension value of the substance is 71.47 mN/m at 20.5 °C. As the surface tension value was higher than 60 mN/m, Reactive Yellow F01-0555 is not classified as surface active substance.

Key value for chemical safety assessment

Surface tension:

71.47

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

10 090

Additional information

The determination of the surface tension was carried out using a Krüss K6 Tensiometer applying the ring method.

The measured value was found to be 71.2mN/m at 20.5°C.

 

The surface tension value after correction by the Harkins-Jordan correction factor is 71.47 mN/m at 20.5 °C.

As the surface tension value was higher than 60 mN/m, Reactive Yellow F01-0555 is not classified as surface active substance.