N,N-bis(2-hydroxyethyl)glycine

Surface tension

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 guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Deviations:

no

Test guideline 2

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

Test material information

Constituent 1

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

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

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.