Diethyl bis(2-hydroxyethyl)aminomethylphosphonate

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:

2018

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:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Deviations:

no

Principles of method if other than guideline:

In this test, the melting and boiling temperatures of the test item are investigated by differential scanning calorimetry (DSC). 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 deviation (e.g. melting, boiling) from the base line of the heat flow record. As result, a thermogram is obtained in which the transition heat flow is exhibited as a function of the temperature.

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Remarks on result:

not determinable

Remarks:

No endothermic effects were detected between the starting temperature of -90°C and the final measurement temperature of 500 °C

Key result

Atm. press.:

1 002 hPa

Decomposition:

yes

Decomp. temp.:

ca. 150 °C

Remarks on result:

other: Start of decomposition

The test item showed a first exothermic effect starting from 120 °C with an average energy release of -5 J/g and another exothermic effect starting at a temperature of 150 °C with an average release energy of -390 J/g. No endothermic effects were detected between the starting temperature of -90°C and the final measurement temperature of 500 °C which can be assigned to a melting or a boiling of the test item.

Conclusions:

The test item has no melting point between -90 °C and its decomposition starting at a temperature of approx. 150 °C.

Executive summary:

In this test, the melting temperature of the test item is investigated by differential scanning calorimetry (DSC).

The test item has no melting point between -90 °C and its decomposition starting at a temperature of approx. 150 °C as determined by differential scanning calorimetry method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).

The test item showed a first exothermic effect starting from 120 °C with an average energy release of -5 J/g and another exothermic effect starting at a temperature of 150 °C with an average release energy of -390 J/g.

Description of key information

The test item has no melting point between -90 °C and its decomposition starting at a temperature of approx. 150 °C. (OECD 102, DSC; Kremer 2018; GLP).

Additional information

A fully reliable, guideline, GLP study is available, and therefore considered as key.