[No public or meaningful name is available]

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12 Mar - 24 Mar 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2021

Report date:

2021

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Results and discussion

Melting / freezing point

Key result

Melting / freezing pt.:

172.3 °C

Decomp. temp.:

> 270 °C

Any other information on results incl. tables

Melting point / melting range: DSC measurement
Two DSC measurements up to 500 °C with a heating rate of 10 K/min showed an endothermal effect in the temperature range of 155 – 185 °C and an exothermal effect (decomposition) in the temperature range 270 – 430 °C. A black residue remained in the crucible. In the following experiments the heating of the crucibles was stopped at 200 °C. Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 160 – 185 °C. After the experiments an orange brown melt remained in the crucible.
The onset temperature (see Table 1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. The results of the DSC measurements are summarized in Table 1.

ID	test item [mg]	start temperature [°C]	final temperature [°C]	temperature range [°C	onset [°C]	crucible	observations after measurement
1	14.70	25	500	155-185	171.82	aluminium with a hole	Black solid, 35% mass loss
2	11.27	25	500	155-185	172.22	aluminium with a hole	Black solid, 35% mass loss
3	11.62	25	200	160-185	172.79	aluminium with a hole	Orange brown melt, no mass loss
4	10.67	25	200	160-185	171.17	aluminium with a hole	Orange brown melt, no mass loss

Applicant's summary and conclusion

Conclusions:

The melting point of the test item was measured by DSC-measurements.
The test item had a mean melting point according to European Commission Regulation (EC) No. 440/2008, A.1. as well as OECD 102 (1995) of 172.3 °C.

Executive summary:

Test Design: The melting point is determined by differential scanning calorimetry (DSC). The test item and the reference item are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded.

 

Result: The test item had a mean melting point according to European Commission Regulation (EC) No. 440/2008, A.1. as well as OECD 102 (1995) of 172.3 °C.