Reactive Blue F08-0170

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

09 November 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with recognised study guidelines and in compliance with GLP.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Test guideline 2

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

Test material

Test material information

Constituent 1

Details on test material:

Name: Reactive Blue F08-0170

Results and discussion

Surface tension

Surface tension:

72.7 mN/m

Temp.:

20 °C

Conc.:

999.8 mg/L

Any other information on results incl. tables

Results

 

In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, repeated measurements were carried out with increasing the equilibrium time.
A constant surface tension was reached after about 275 sec (see Table 1).

 

Table 1. Time dependence of the surface tension after transferring the solution to the measurement vessel
Surface tension (mN/m)	Equilibrium time (sec)
72.0	210
72.6	275
72.8	300
72.6	320
72.7	330
Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

 

The surface tension ofReactive Blue F08-0170aqueous solution read on the instrument was 72.7 mN/m at 20°C, using the OECD harmonised ring method, representing the mean of five separate measurements. The equilibrium time for these five measurements was in a range of 325 - 370 sec. The details are shown in Table 2.

 

Table 2.:Measured surface tension values and equilibrium times
Surface tension (mN/m)	Equilibrium time (sec)
72.6	340
72.8	325
72.7	370
72.6	330
72.7	350
Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

 

The measured surface tension was multiplied by the correction factor and then corrected according to Harkins and Jordan, resulting in a corrected surface tension of 72.6 mN/m.

 

As the surface tension value was higher than 60 mN/m, Reactive Blue F08-0170 is not classified as surface active.

Applicant's summary and conclusion

Conclusions:

The measured surface tension was multiplied by the correction factor and then corrected according to Harkins and Jordan, resulting in a corrected surface tension of 72.6 mN/m.

As the surface tension value was higher than 60 mN/m, Reactive Blue F08-0170 is not classified as surface active.

Executive summary:

The determination of the surface tension was carried out on the test item as supplied by the sponsor, with a Krüss K6 Tensiometer using the OECD harmonised ring method. The measured value was found to be 72.6 mN/m.

As the surface tension value was higher than 60 mN/m, Reactive Blue F08-0170 is not classified as surface active.