Reaction mass of 2,6-Bis[(dimethylamino)methyl]-4-(1-{3-[(dimethylamino)methyl]-4-hydroxyphenyl}-1-methylethyl)phenol and 4-(1-{3,5-Bis[(dimethylamino)methyl]-4-hydroxyphenyl}-1-methylethyl)-2,6-bis[(dimethylamino)methyl]phenol

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

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Principles of method if other than guideline:

DTA/DSC

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

>= 40 - <= 90 °C

Atm. press.:

1 013 hPa

Decomposition:

yes

Remarks:

The unsteady base line and inconstant thermal (approx. 230 °C and 450 °C) effects could be interpreted as decomposition (> 230 °C) of the test item.

Result:

No definite melting point could be determined.

In the closed crucible, two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.

This corresponds to the behaviour of the test item in the open crucible.

Conclusion:

Between 25 °C and 450 °C no definite melting could be observed. In the same temperature range no definite boiling point was detectable.

Two endothermic effects were visible between approx. 30 °C – 95 °C indicating a large melting range.

Between approx. 230 °C and 320 °C and approx. 330 °C and 450 °C further endothermic effects were observed. Since no steep endothermic signal could be detected there is no indication for a definite boiling point. The unsteady base line and inconstant thermal effects could be interpreted as decomposition of the test item.

The endothermic effects up to a temperature of 100 °C were verified in a second determination with reduced heating rate. The endothermic phases were likewise detected between approx. 40 °C and approx. 90 °C indicating a large melting range.

Melting range:approx. 40 – 90 °C

Conclusions:

No definite melting point could be determined for HPP 12879-1. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.

Executive summary:

A melting point study according to OECD 102 was performed using a Differential Thermal Analysis (DTA) / Differential Scanning Calorimetry (DSC).

No definite melting point could be determined for HPP 12879 -1. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.

Description of key information

No definite melting point could be determined. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

40 °C

Additional information

As melting starts at 40 °C this value was taken as melting point for the CSA.