Methyl 4-[2-[4-(5-methyl-2-benzoxazolyl)phenyl]vinyl]benzoate

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:

May 03rd, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted July 27, 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: OECD guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Version / remarks:

adopted May 12, 1981

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

The test item was used in its initial form.

Melting / freezing pt.:

126 - 329 °C

Before the test the appearance of the test item was yellow powder; after the experiments the substance melted and became dark brown in the crucible with bubbles in the melt.

Applying a linear heating rate, the substance starts to melt at ca 126 °C and undergoes to complete melting  at 329.1 °C (602.3 K).

	Sample weight [mg]	Total loss of Mass of the Sample [%]
Replicate 1	3.67	53.7
Replicate 2	2.78	48.2

		Experiment 1	Experiment 2	Mean
Endothermic Peak 1	Onset of effect [°C]	126.64	126.02	126.33
	Endset of effect [°C]	133.28	132.21	132.75
	Energy [J/g]	-5.41	-5.39	-5.40 (endothermic)
Endothermic Peak 2	Onset of effect [°C]	194.37	193.21	193.79
	Endset of effect [°C]	202.79	200.76	201.78
	Energy [J/g]	-60.29	-63.91	-62.10 (endothermic)
Endothermic Peak 3	Onset of effect [°C]	291.89	284.71	288.3
	Endset of effect [°C]	294.96	289.88	292.42
	Energy [J/g]	-9.41	-9.96	-9.69 (endothermic)
Endothermic Peak 4	Onset of effect [°C]	334.04	324.17	329.11
	Endset of effect [°C]	336.77	327.5	332.14
	Energy [J/g]	-2.13	-2.3	-2.22 (endothermic)

Supplementary Tests

Temperature range [°C]	Sample weight [mg]	Loss of Mass [%]	Observation
25 – 136	2.21	0	yellow powder
25 – 203	2.21	0.5	yellowish melt
25 – 298	1.98	10.6	yellow melt
25 – 338	2.46	11	yellowish brown melt

Conclusions:

The substance starts to melt at ca 126 °C and undergoes to complete melting  at 329.1 °C (602.3 K).

Executive summary:

The thermal behaviour of the test item was investigated by Differential Scanning Calorimetry method, according to the OECD guidelines 102 and 113. A small amount of test item placed in aluminum cosed crucible and inserted into the furnace of the DSC device. The temperature was increased from 25 to 500 °C with 10 °C/minutes heating rate. The measurement was performed under nitrogen atmosphere. The experiment was performed in duplicate.

A supplementary test was run, in order to clarify the substance thermal behavior. A small amount of test item was placed into a closed aluminum crucible and heated from 25 °C up to 136 °C and 338 °C with 10 °C/minutes heating rate, than cooled down to 25 °C.

Before the test the appearance of the test item was yellow powder; after the experiments the substance melted and became dark brown in the crucible with bubbles in the melt. Applying a linear heating rate, the substance starts to melt at ca 126 °C and undergoes to complete melting  at 329.1 °C (602.3 K).

Conclusion

The substance starts to melt at ca 126 °C and undergoes to complete melting  at 329.1 °C (602.3 K).

Description of key information

The substance starts to melt at ca 126 °C and undergoes to complete melting  at 329.1 °C (602.3 K).

Additional information

OECD 102/113 - Differential Scanning Calorimetry method