Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

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 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

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

Melting / freezing pt.:

< -90 °C

Atm. press.:

1 004 mBar

Decomposition:

no

Sublimation:

no

Remarks on result:

not determinable

Results

To determine the melting behaviour (three independent single measurements), the test item was measured by DSC between -90 °C and 50 °C with a heating / cooling rate of 10 K/min in 2 cycles. For the measurement a capsulated crucible was used. The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate shows no melting of crystalline subcomponents between -90 °C and 50 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination). At ambient temperature the test item is a liquid. The cooling run shows no crystallization. In the 1st heating run the test item shows a glass transition temperature of amorphous components at about -69 °C.

Conclusions:

The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate shows no melting of crystalline subcomponents between -90 °C and 50 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination). At ambient temperature the test item is a liquid.

Executive summary:

The melting temperature of the test item was determined in accordance with the test method OECD Guideline 102 “OECD Guideline For The Testing Of Chemicals, adopted by the Council on 27th July 1995, Melting Point/Melting Range” (similar to the test method A.1. “Melting/Freezing Temperature” as described in the Official Journal of the European Communities L383A). The test item Ethyltris(2-hydroxyethyl)ammonium ethyl sulphate shows no melting of crystalline subcomponents between -90 °C and 50 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination). At ambient temperature the test item is a liquid.

Description of key information

The test item shows no melting of crystalline subcomponents between -90 °C and 50 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination). At ambient temperature the test item is a liquid.