Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

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)

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

no

Type of method:

ring method

Specific details on test material used for the study:

Name: Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate
Product Description: Triethanolamine DES Quat
CAS No.: 31774-90-0
Physical state: colourless to yellow viscous liquid at 20 °C
Batch No.: PFS-755-175
Re-certification date of batch: 21 April 2018
Purity: 100 % (UVCB, water content 0.33 % (w/w))
pH, 5% in water 7.85
Acid Value , mg KOH/g 38.45
Moisture, % 0.33
Total Amine, mg/g 33.10
Viscosity,cps, #4@60,25C 1580
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light

Key result

Surface tension:

ca. 71.5 mN/m

Temp.:

20 °C

Conc.:

997 mg/L

Remarks on result:

other: age of the solution: 241 min

Key result

Surface tension:

71.1 mN/m

Temp.:

20 °C

Conc.:

929 mg/L

Remarks on result:

other: age of the solution: 88 min

Quantitative Determination

Two different samples were prepared. The surface tension should be measured, if the solutions are in an equilibrium state. The solution in the measuring vessel is approximately in equilibrium, if the measured surface tension is nearly constant (deviation ≤ 0.1 mN/m).

The average of 6 single measurements was determined per solution. In this case the total measuring time was more than 1000s per solution.

Water calibration: Temp. = 21 °C, rho  = 0.998 g/cm3

Surface tension of purified water
Value 1	71.8 mN/m
Value 2	71.8 mN/m
Value 3	71.7 mN/m
Value 4	71.7 mN/m
Value 5	71.6 mN/m
Value 6	71.3 mN/m
Arithmetic mean	71.7 mN/m
Standard deviation	0.2 mN/m

First test solution: c = 929 mg/l, Temp. = 21 °C, rho = 0.998 g/cm3, age of the solution: 88 min

Surface tension of the solution
Value 1	71.1 mN/m
Value 2	71.1 mN/m
Value 3	71.1 mN/m
Value 4	71.1 mN/m
Value 5	71.1 mN/m
Value 6	71.1 mN/m
Arithmetic mean	71.1 mN/m
Standard deviation	0.0 mN/m

Second test solution:  c = 997 mg/l, Temp. = 21 °C, rho = 0.998 g/cm3, age of the solution: 241 min

Surface tension of the solution
Value 1	71.4 mN/m
Value 2	71.4 mN/m
Value 3	71.5 mN/m
Value 4	71.5 mN/m
Value 5	71.5 mN/m
Value 6	71.4 mN/m
Arithmetic mean	71.5 mN/m
Standard deviation	0.1 mN/m

Conclusions:

The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate has a surface tension of 72.0 mN/m (c=approx. 1 g/l) in accordance with the test method A.5. "Surface Tension" as described in the Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), also similar to OECD guideline for testing of chemicals OECD 115.

Executive summary:

The surface tension of the test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate was determined in accordance with the test method A.5. "Surface Tension" as described in the Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), also similar to OECD guideline for testing of chemicals OECD 115. The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate has a surface tension of 72.0 mN/m (c=approx. 1 g/l) in accordance with the test method A.5. "Surface Tension" as described in the Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), also similar to OECD guideline for testing of chemicals OECD 115.

Description of key information

The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate has a surface tension of 72.0 mN/m (c=approx. 1 g/l) in accordance with the test method A.5. "Surface Tension" as described in the Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), also similar to OECD guideline for testing of chemicals OECD 115.

Key value for chemical safety assessment

Surface tension:

72

in mN/m at 20°C and concentration in mg/L:

1 000