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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November 16 – December 11, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes
Type of method:
OECD harmonised ring method
Specific details on test material used for the study:
Composition: Benzenesulfonic acid, 2,4,5-trichloro-, sodium salt
Purity: 100%
CAS# 53423-65-7
EC# 258-548-3
Physical Description: White powder
Stability: Test substance was expected to be stable for the duration of testing.
Expiration Date: December 31, 2018
Key result
Surface tension:
71.2 mN/m
Temp.:
20 °C
Conc.:
1 000 mg/L

SURFACE TENSION

Reading Number

Repetition 1

Repetition 2

Repetition 3

Temperature (ºC)

Measured Surface Tension (mN/m)

Temperature (ºC)

Measured Surface Tension (mN/m)

Temperature (ºC)

Measured Surface Tension (mN/m)

1

20.1

69.2

20.1

69.0

20.0

69.0

2

20.0

70.0

20.0

69.0

20.1

69.0

3

20.0

69.5

20.1

68.8

20.0

68.8

Average

20.0

69.6

20.1

68.9

20.0

68.9

Standard Deviation

0.1

0.4

0.1

0.1

0.1

0.1

Repetition Number

Temperature (ºC)

Measured Mean Surface Tension (mN/m)

Φb-corrected Mean Surface Tension (mN/m)

1

20.0

69.6

71.7

2

20.1

68.9

71.0

3

20.0

68.9

71.0

Average

20.0

69.1

71.2

Standard Deviation

0.1

0.4

0.4

Correction factor – 1.03

Conclusions:
The surface tension (OECD harmonized ring method) was determined to be 71.2 mN/m.
Executive summary:

In this GLP guideline study conducted using the OECD harmonized ring method based on the procedures described in  OECD Guidline 115 and E.U method A.5, the surface tension at a test concentration of 1000 mg/L at 20 deg. Celsius was determined to be 71.2 mN/m. Given this result, the suface tension of aqueous solutions is not expected to play a significant role in assessing environmental fate or aquatic toxicity of this substance.

Description of key information

In a GLP guideline study conducted using the OECD harmonized ring method based on the procedures described in  OECD Guidline 115 and E.U method A.5, the surface tension, at a test concentration of 1000 mg/L at 20 deg. Celsius, was determined to be 71.2 mN/m. Given this result, the suface tension of aqueous solutions is not expected to play a significant role in assessing environmental fate or aquatic toxicity of this substance.

Key value for chemical safety assessment

Surface tension:
71.2
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information