Registration Dossier

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes (incl. certificate)
Other quality assurance:
other: SOP-LA-051
Remarks:
Determination of the surafce tension of aqueous liquids
Type of method:
ring method
Surface tension:
50.36 mN/m
Temp.:
20 °C
Conc.:
1 013.4 mg/L
Remarks on result:
other: Total mean value of two measurements.

The results of two measurements are summarized in Table 6.

Table 6: Measured surface tension values

Value No

1st Measurement

(20 min after preparing the solution) σ

[mN/m]

2nd Measurement

(35 min after preparing the solution) σ

[mN/m]

 
 1

50.65

50.20
 2 50.62 50.17 
 3 50.59 50.14 
 4 50.56 50.12 
 5 50.54  50.09 
 6 50.52 50.07 
 Mean value of the individual values 50.58 ± 0.06  50.13 ± 0.11
 Total mean values

    50.36  ± 0.23

The test item has a mean surface tension of 50.36 mN/m. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.

Conclusions:
The test item has a mean surface tension of 50.36 mN/m at 20°C. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.
Executive summary:

According to OECD Test Guideline 115 and Regulation EC No. 440/2008 Part A Method A.5. the surface tension at 20 °C of test item Hydrogen [4-[[4-diethylamino)phenyl][4-[ethyl[(3-sulphonatobenzyl)amino]-o-tolyl]methylene]-3-methylcylohexa-2,5-dien-1-ylidene](ethyl)3-sulphonatobenzyl)ammonium, sodium salt was determined to be 50.36 mN/m

According to Regulation EC No. 440/2008 Part A Method A.5. the test item is to be regarded as surface active material.

Description of key information

The test item has a mean surface tension of 50.36 mN/m at 20°C. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.

Key value for chemical safety assessment

Surface tension:
50.36
in mN/m at 20°C and concentration in mg/L:
1 013.4

Additional information