m-phenylenebis(methylamine)

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:

Testing was conducted between 2009-07-30 and 2009-08-20

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

BS4633

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of Inspection 2008-08-19; Date of Signature 2009-03-04

Type of method:

method to determine freezing temperature

Remarks:

Method for the determination of crystallizing point

Melting / freezing pt.:

287.15 K

Decomposition:

no

Sublimation:

no

Cooling data for Determinations 1 and 2 are shown in the following tables:

 

Determination 1

Time(s)	Temperature (K)	Time(s)	Temperature (K)
0	292.65	690	283.65
30	291.65	720	284.15
60	291.15	750	284.65
90	290.65	780	286.65
120	290.15	810	287.15
150	289.65	840	287.15
180	289.15	870	287.15
210	288.65	900	287.15
240	288.15	930	287.15
270	287.65	960	287.15
300	287.15	990	287.15
330	286.65	1020	287.15
360	286.65	1050	287.15
390	286.15	1080	287.15
420	286.15	1110	287.15
450	286.15	1140	287.15
480	285.15	1170	287.15
510	285.15	1200	287.15
540	284.65	1230	287.15
570	284.15	1260	287.15
600	284.15	1290	287.15
630	283.65	1320	287.15
660	283.65

Determination 2

Time(s)	Temperature (K)	Time(s)	Temperature (K)
0	298.15	630	289.65
30	297.15	660	289.65
60	296.15	690	289.15
90	296.15	720	289.15
120	295.15	750	288.65
150	294.15	780	288.65
180	294.15	810	288.15
210	293.65	840	288.15
240	293.15	870	287.65
270	292.65	900	287.65
300	292.15	930	287.15
330	291.65	960	287.15
360	291.15	990	287.15
390	290.15	1020	287.15
420	290.65	1050	287.15
450	290.65	1080	287.15
480	290.65	1110	287.15
510	290.15	1140	287.15
540	290.15	1170	287.15
570	290.15	1200	287.15
600	289.65	1230	287.15

Graphs of temperature (K) versus time (seconds) for Determinations 1 and 2 are shown in Figures 1 and 2 respectively (attached).

In Determination 1 the temperature of the test material was recorded at a minimum of 283.65 K while the test material was still in the liquid state. The temperature then increased to a plateau of 287.15 K where the test material was observed to freeze. This sequence of events shows that the test material had undergone the process of supercooling.

The test material appears not to have undergone supercooling in Determination 2; however both determinations recorded a plataeu temperature of 287.65 K where the test material was observed to freeze.

Conclusions:

The freezing point of the test material has been determined to be 287.15 ± 0.5 K

Description of key information

GLP guideline study quoting melting/freezing point as 287.15 ± 0.5 K (OECD 102)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

14 °C

Additional information

Result equates to a melting/freezing point of 14 °C