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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:
Dec 1995 - Jan 1996
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes
Type of method:
ring method
Key result
Surface tension:
64.1 mN/m
Temp.:
20 °C
Conc.:
90 vol%
Conclusions:
The surface tension of CGP 48933 Step 9 in water was determined to be 64.1 mN/m at 20.0 °C ± 0.5 °C.
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Dec 1996
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Qualifier:
according to guideline
Guideline:
other: ISO 304 ("Surface active agents - Determination of Surface Tension by Drawing up Liquid Films")
GLP compliance:
yes
Type of method:
plate method
Key result
Surface tension:
>= 59.6 - <= 60.1 mN/m
Temp.:
20 °C
Conc.:
0.1 g/L
Key result
Surface tension:
>= 66.3 - <= 68.1 mN/m
Temp.:
20 °C
Conc.:
0.01 g/L
Conclusions:
Surface tension at 20.°C:
- filtrates of 0.1 g/L suspensions is 59.6 - 60.1 mN/m
- filtrates of 0.01 g/L suspensions is 66.3 - 68.1 mN/m


Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 17 December 2018 to 11 January 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
1995
Deviations:
no
GLP compliance:
yes
Type of method:
OECD harmonised ring method
Specific details on test material used for the study:
water solubility: not specified
Key result
Surface tension:
51.23 mN/m
Temp.:
20 °C
Remarks on result:
other: Conc.= 90% saturation in water

Table: Surface tension measurements

Measurement

Time passed after measurement start
[seconds]

Surface tension
(mN/m)

individual σ multiplied by

Harkins-Jordan corrected value

mean

 

1

39.39

51.32

51.23

2

65.15

51.21

 

3

91.74

51.21

 

4

117.35

51.22

 

5

142.91

51.19

 

Conclusions:
The surface tension of an aqueous substance solution at 90% saturation was determined to be 51.23 mN/m (at 20°C).

Executive summary:

The OECD harmonized ring method was used in a GLP study based on EC A.5 and OECD 115. The surface tension of an aqueous substance solution at 90% saturation was determined to be 51.23 mN/m (at 20°C). According to EC A.5 the substance is surface active.

Description of key information

The surface tension of an aqueous substance solution at 90% saturation was determined to be 51.23 mN/m (at 20°C).

Surface tension at 20.°C:

- filtrates of 0.1 g/L suspensions is 59.6 - 60.1 mN/m

- filtrates of 0.01 g/L suspensions is 66.3 - 68.1 mN/m

Key value for chemical safety assessment

Surface tension:
60
in mN/m at 20°C and concentration in mg/L:
100

Additional information