1,7-Naphthalenedisulfonic acid, 2-[[4-chloro-6-(cyanoamino)-1,3,5-triazin-2-yl]amino]-5-hydroxy-6-[2-[2-methoxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-, lithium sodium salt (1:?:?)

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 June 30, 1999 to October 05, 1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Surface tension:

54.1 mN/m

Temp.:

20 °C

Conc.:

1 000 mg/L

After correction with respect to the table given In the directive A5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is: w= 54.1 mN/m

Conclusions:

Under the test conditions, the surface tension of the test material was determined to be 54.1 mN/m at 20 °C

Executive summary:

A study was performed to determine the surface tension of the test substance according to EU Method A.5. in compliance with GLP.

In the preliminary study, calibration of the apparatus was carried out using distilled water. The surface tension was determined to: WE = 72.12 mN/m. The calibration factor F was calculated with respect to the literature value for water: F=Wlit/ WE =1.0064.

An aqueous solution at ambient temperature of the test substance with a concentration of 1.0 g/L was prepared. Six measurements at a temperature of 20 °C, every 5 min, were done.

The mean value, multiplied by the calibration factor yields: W_F= W x F = 55.28 mN/m

After correction with respect to the table given In the directive A5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is: w= 54.1 mN/m

Under the test conditions, the surface tension of the test substance was determined to be 54.1 mN/m at 20 °C.

Description of key information

The surface tension of the test substance was determined to be 54.1 mN/m at 20 °C

Key value for chemical safety assessment

Surface tension:

54.1

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

1 000

Additional information

A study was performed to determine the surface tension of the test substance according to EU Method A.5.

In the preliminary study, calibration of the apparatus was carried out using distilled water. The surface tension was determined to: WE = 72.12 mN/m. The calibration factor F was calculated with respect to the literature value for water: F=Wlit/ WE =1.0064.

An aqueous solution at ambient temperature of the test substance with a concentration of 1.0 g/L was prepared. Six measurements at a temperature of 20 °C, every 5 min, were done.

The mean value, multiplied by the calibration factor yields: W_F= W x F = 55.28 mN/m

After correction with respect to the table given In the directive A5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is: w= 54.1 mN/m. The surface tension of the test substance was determined to be 54.1 mN/m at 20 °C (Smeykal H, 1999).