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Physical & Chemical properties

Melting point / freezing point

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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:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
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
Specific details on test material used for the study:
The test item was mixed prior to the study by the test facility in equal parts from the following three subsamples:
Subsample 1:
Supplier: Befesa Aluminio S.L
Carreta Luncaha- Asúa 13
48950 Erandio (Vizcaya), Spain
Batch No.: Paval Nov 2020
Appearance: Grey solid
Storage conditions: Ambient temperature (10 °C to 30 °C)
Expiry date: November 19, 2021

Subsample 2:
Supplier: RAFFMETAL SPA
Via Malpaga 82
25070 Casto (BS), Italy
Batch No.: Rapal01 Nov 2020
Appearance: Grey solid
Storage conditions: Ambient temperature (10 °C to 30 °C)
Expiry date: December 16, 2021

Subsample 3:
Supplier: Intals SPA
Via Schievano 7
20100 Milano (MI), Italy
Batch No.: Argalum Dec 2020
Appearance: Grey solid
Storage conditions: Ambient temperature (10 °C to 30 °C)
Expiry date: January 11, 2022
Melting / freezing pt.:
> 500 °C

The first DSC measurement in an aluminium crucible with a hole showed two endothermal effects in the temperature ranges of 60 – 170 °C and 220 – 350 °C, respectively. After the measurement the test item was a visually unchanged. The mass loss after the DSC measurement amounted to 20 %.


The second measurement in an aluminium crucible with a hole showed an endothermal effect in the temperature range of 85 – 150 °C. The measurement was terminated at 180 °C. The mass loss after the DSC measurement amounted to 12 %.


The result of the DSC measurement is summarized in Table 1.


Table 1: DSC measurements

































Ident No.



Test item /


mg



Starting temperature /


°C



Final test temperature /


°C



Temperature range /


°C



Crucible



Observations after the measurement



39499



17.00



25



500



60 – 170
(endothermal)


220 – 350
(endothermal)



Aluminium with a hole



Test item was visually unchanged; mass loss: 20 %



39506



18.51



25



180



85 – 150
(endothermal)



Aluminium with a hole



Test item was visually unchanged; mass loss: 12 %



Under consideration of the result from the DSC measurements and the optical observation after the measurements it was concluded that the test item had no melting point and no boiling point at atmospheric conditions.


 

 
Conclusions:
The test item had a no melting point up to 500 °C at atmospheric conditions according to European Commission Regulation (EC) No. 440/2008, A.1. and OECD 102 (1995).
Executive summary:

Winkler (2021) is a GLP-compliant study following OECD guideline 102 and EU method A1. It is reliable without restrictions and can be used as a key study for this endpoint. Melting point was determined using differential scanning calorimetry. The test item had no melting point up to 500 °C at atmospheric conditions.


 

 

 

 

 

 

Description of key information

The test item had no melting point up to 500 °C at atmospheric conditions.

Key value for chemical safety assessment

Additional information