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Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 23 January 2017 to 16 March 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2008
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

Test material

Constituent 1
Chemical structure
Reference substance name:
N,N-bis(2-hydroxyethyl)glycine
EC Number:
205-755-1
EC Name:
N,N-bis(2-hydroxyethyl)glycine
Cas Number:
150-25-4
Molecular formula:
C6H13NO4
IUPAC Name:
N,N-bis(2-hydroxyethyl)glycine
impurity 1
Chemical structure
Reference substance name:
N-(2-hydroxyethyl)ethylenediaminetriacetic acid
EC Number:
205-759-3
EC Name:
N-(2-hydroxyethyl)ethylenediaminetriacetic acid
Cas Number:
150-39-0
Molecular formula:
C10H18N2O7
IUPAC Name:
N-{2-[bis(carboxymethyl)amino]ethyl}-N-(2-hydroxyethyl)glycine
impurity 2
Reference substance name:
Not specified
IUPAC Name:
Not specified
impurity 3
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Dihydrogen oxide
Test material form:
solid: crystalline
Details on test material:
Appearance: white crystalline powder
Storage conditions: at room temperature protected from light

Results and discussion

Surface tension
Key result
Surface tension:
72.2 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Any other information on results incl. tables

Table: Surface tension measurements

 

Measurement

Time passed after transfer test solution to test vessel
[minutes]

Surface tension
[mN/m]

individual

mean

mean multiplied by
Fb (1)

 

 

 

 

 

1

15

73.8

 

 

2

16

73.7

73.7

72.2

3

17

73.9

 

 

4

18

73.7

 

 

5

19

73.6

 

 

 

 

 

 

 

(1) Because > 72.0 mN/m, correction according to Harkins-Jordan was not required

Applicant's summary and conclusion

Conclusions:
The surface tension at 20°C of a 1 g/L solution of the substance was determined to be 72.2 mN/m.

Executive summary:

Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension at 20°C of an aqueous solution of the substance at 1 g/L was determined to be 72.2 mN/m. According to the EC A.5 guideline the substance is not surface active.