Diethyl bis(2-hydroxyethyl)aminomethylphosphonate

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Deviations:

no

Principles of method if other than guideline:

With this method the difference in energy input into the test item and a reference material as a function of temperature is recorded, while the substance and reference material are subjected to the same temperature program. This energy is the energy necessary to establish zero temperature difference between the test item and the reference material. When the sample undergoes a transition involving a change of enthalpy, that change is indicated by an endothermic departure (e.g. melting, boiling) from the base line of the heat flow record. As result, one gets a thermogram in which the transition heat flux is exhibited as a function of the temperature. In this diagram, the onset of the reaction (e.g. decomposition, physical process) as well of the heat-flux of the reaction is shown.

GLP compliance:

yes

Test substance thermally stable:

no

Operating temp.:

>= 150 - <= 160 °C

Remarks on result:

other: exothermic effect

Operating temp.:

>= 330 - <= 340 °C

Remarks on result:

other: endothermic effect

Sublimation:

no

Transformation products:

not measured

Test substance stable to sunlight:

not determined

Test substance stable to metals / metal ions:

not determined

Conclusions:

In the DSC-measurement the average energy of the exothermic decomposition of the test item was -700 J/g and therefore above the threshold of -500 J/g. A detonation hazard can be excluded, since the decomposition energy is below the limit of - 800 J/g. Explosion hazards cannot be excluded on the basis of the present results.

Executive summary:

In this test, the thermal stability of the test item is investigated by DSC.

In the DSC-measurement the average energy of the exothermic decomposition of the test item was -700 J/g and therefore above the threshold of -500 J/g. A detonation hazard can be excluded, since the decomposition energy is below the limit of - 800 J/g. Explosion hazards cannot be excluded on the basis of the present results.

Description of key information

In a thermal stability test, the test item has an average exothermic decomposition energy of -700 J/g (OECD113, DSC; Kremer 2018; GLP).

Justification for classification or non-classification

Based on CLP criteria, the decomposition energy is above the threshold of -500 J/g. A detonation hazard can be excluded, since the decomposition energy is below the limit of - 800 J/g. Explosion hazards cannot be excluded on the basis of the present results.