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Physical & Chemical properties

Surface tension

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Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2014
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
no
Type of method:
plate method
Surface tension:
52.661 mN/m
Temp.:
20 °C
Conc.:
0.25 mg/L
Conclusions:
In conclusion, the surface tension of FAT 41001/H TE was determined to be 52.661 mN/m at room temperature ca 20 °C. The variation of specification factor was 0.003488 mN/m.
Executive summary:

The determination of the surface tension of the test item was based on OECD Guideline No. 115: “Surface Tension of Aqueous Solutions” (1995) and on the EEC Directive 92/69, Part A, methods for the determination of physio-chemical properties, A5

“Surface Tension”, EEC Publication No. L383, December 1992.

In conclusion, the surface tension of FAT 41001/H TE was determined to be 52.661 mN/m at room temperature ca 20 °C. The variation of specification factor was 0.003488 mN/m.

Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH

1. HYPOTHESIS FOR THE ANALOGUE APPROACH
This read-across is based on the hypothesis that the source and the target substance have very similar physicochemical and (eco)toxicological properties because their chemical structures are nearly identical. An analogue approach has thus been employed. The target substance is the meta-isomer of the dye Reactive Blue 049, where the sulphonate group is bound at the meta-position of the aminobenzene moiety. The source chemical is the reaction mass of both the meta-isomer and the para-isomer of Reactive Blue 049.
The presence of sulphonate groups make both dyes highly water soluble and therefore less critical for human health and environmental issues. Based on their chemical similarity, similar properties are expected in both humans and the environment.

2. SOURCE AND TARGET CHEMICAL(S)
Source: Reactive Blue 49 meta/para (CAS# 72214-18-7 / EC# 276-481-8)
Target: Reactive Blue 49 meta (CAS# 72927-99-2 / EC# 277-040-2)

3. ANALOGUE APPROACH JUSTIFICATION
see attachment under 4.2 Melting point / freezing point
Reason / purpose:
read-across source
Key result
Surface tension:
52.661 mN/m
Temp.:
20 °C
Conc.:
0.25 mg/L
Conclusions:
In conclusion, the surface tension was determined to be 52.661 mN/m at room temperature ca 20 °C. The variation of specification factor was 0.003488 mN/m.
Executive summary:

The determination of the surface tension of the test item was based on OECD Guideline No. 115: “Surface Tension of Aqueous Solutions” (1995) and on the EEC Directive 92/69, Part A, methods for the determination of physio-chemical properties, A5

“Surface Tension”, EEC Publication No. L383, December 1992.

In conclusion, the surface tension was determined to be 52.661 mN/m at room temperature ca 20 °C. The variation of specification factor was 0.003488 mN/m.

Description of key information

The surface tension was determined to be 52.661 mN/m at ca. 20°C. Hence the test material has surface active properties.

Key value for chemical safety assessment

Surface tension:
52.661
in mN/m at 20°C and concentration in mg/L:
0.25

Additional information

The determination of the surface tension of the source substance was based on OECD Guideline No. 115. The test item was measured using a 0.25 % (w/w) solution. The surface tension was determined to be 52.661 mN/m at ca. 20 °C.

The structurally related target substance will have a similar surface tension and will also show surface-active properties.