2,2'-methylenebis(4,6-di-tert-butyl-phenyl)-2-ethylhexyl phosphite

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:

30 November 1995

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study performed in accordance with EU test guidelines and in compliance with GLP.

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes

Type of method:

capillary method

Melting / freezing pt.:

148 °C

Atm. press.:

other: performed under air flow (about 100 ml/min)

Decomposition:

yes

Decomp. temp.:

258 °C

Sublimation:

no

Preliminary test: An endothermic effect, which was probably caused by melting of the test substance, was observed between about 140 and 161°C (413-434 K). Above about 258°C (531K) an exothermic effect was observed; this effect increased with increasing temperature. Probably this effect was caused by reaction or decomposition of the test substance. During the test the sample lost 0.74 mg (37%) of its mass. After the test sample had a light brown colour and appeared to have been molten.

 

Main study: The endothermic melting peak was observed between 141 and 157°C (414-430 K). The sample did not loose any mass during the experiment. After the test the sample appeared to have been molten. For a pure component the melting point is evaluated from a DSC-curve as the extrapolated onset of the melting peak, i.e. the cross point of the extrapolated base line and the linear part of the rising section of the peak.

Conclusions:

The melting temperature of ADK STAB HP-10 was determined to be 148°C (421 K).
The test substance is not stable at temperatures above about 258°C (531 K).

Executive summary:

The determination of the melting temperature was based on the following guideline:

European Economic Community (EEC), EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A.1 "Melting/Freezing temperature", EEC Publication No. L383, December 1992.

 

Using a differential scanning calorimeter (DSC), both test substance and a reference were heated, using one single heat source. The difference between the enthalpy change which occurs was recorded. From the resultant curve, the melting temperature of ADK STAB HP-10 was determined.

 

The melting point of ADK STAB HP-10 is 148°C (421 K). The test substance is not stable at temperatures above about 258°C (531 K).

Description of key information

Key value determined using EU Method A1.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

148 °C

Additional information

Using a differential scanning calorimeter (DSC), both test substance and a reference were heated, using one single heat source. The difference between the enthalpy change which occurs was recorded. From the resultant curve, the melting temperature of ADK STAB HP-10 was determined.

 

The melting point of ADK STAB HP-10 is 148°C (421 K). The test substance is not stable at temperatures above about 258°C (531 K).