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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
The study was conducted between 21 August 2018 and September 2018.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Identification: Reaction mass of crystalline magnesium silicate and crystalline silicon and synthetic amorphous silicon dioxide
Appearance/Physical state: black powder
Lot No: Y180510A
Purity: Mg-SiO 95 wt% Carbon 4.0 ± 2.0 %wt
Expiry date: 31 May 2019
Storage conditions: room temperature, in the dark
Key result
Melting / freezing pt.:
> 450 °C

After heating to 450 °C, the samples had no measurable weight loss.

Overall result: no signs of melting up to 450°C (723 K)

Conclusions:
The test item has been determined to not melt up to 450°C (723 K).
Executive summary:

No melting occurred up to 450 °C (723 K) by differential scanning calorimetry, using a procedure designed to be compatible with Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

No melting occurred up to 450 °C (723 K) by differential scanning calorimetry, using a procedure designed to be compatible with Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
450 °C

Additional information