REAKTIV-ORANGE DYPR 1410

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04 November 1998

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:

ring method

Key result

Surface tension:

70 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Measurement results:

Measurement	1	2	3	4	5	6
time / min	0	5	10	15	20	25
W/mN/m	69.3	69.7	69.8	70.1	70.3	70.3

Conclusions:

After correction with respect to the table given in the directive A.5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is:

W = 70.0 mN/m

Executive summary:

The purpose of the test was the determination of the surface tension according to Guideline 92/69/EEC PartA.5. Surface tension using the Ring Method. Study conducted in compliance with GLP.

 

The method is based on the measurement of the maximum vertical force, which is necessary to separate a ring being in contact with the liquid filled in a measuring cup, from the surface of this liquid.

Instrument: Digital-Tensiometer K10T (Kruss, Hamburg)

 

After correction with respect to the table given in the directive A.5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is: W = 70.0 mN/m.

 

Description of key information

Surface tension at 20 °C is: W = 70.0 mN/m. The substance is not considered to be surface active.

Key value for chemical safety assessment

Surface tension:

70

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

1 000

Additional information

After correction with respect to the table given in the directive A.5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is: W = 70.0 mN/m.