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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07 November 2018 to 04 December 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
The determination was carried out by a ring method, using a procedure designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.
Deviations:
no
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
The determination was carried out by a ring method, using a procedure designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Specific details on test material used for the study:
Test item: Acid Orange 94 Refined
Alternative name: Disodium 5, 5’-[(1-methylethylidene)bis(4,1-phenyleneoxysulphonyl-2,1-phenyleneazo)]bis[6-aminonaphthalene-1-sulphonate]
CAS number: 70161-18-1
EC number: 274-354-1
Intended use: Industrial chemical
Appearance: Reddish brown crystals
Storage conditions: Room temperature (10 – 30C), in the dark
Lot number: 8009
Expiry/Retest date: 31 December 2019
Purity: 97%
Key result
Surface tension:
>= 58 - <= 60 mN/m
Temp.:
20 °C
Conc.:
0.102 g/L
Key result
Surface tension:
>= 57 - <= 59 mN/m
Temp.:
20 °C
Conc.:
0.101 g/L

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

Conclusions:
The surface tension at nominally 1 g/L of test item in water has been determined to be 57.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. The test item was considered to be surface-active.
Executive summary:

The surface tension was determined using ring method, designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995, in accordance with GLP.

The surface tension at nominally 1 g/L of test item in water was been determined to be 57.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. As the test item demonstrated to show a surface tension lower than 60 mN/m under the conditions of this method th test item is considered to be surface-active.

Description of key information

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

The surface tension at nominally 1 g/L of test item in water has been determined to be 57.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. The test item was considered to be surface-active.

Key value for chemical safety assessment

Surface tension:
57.5

Additional information