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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
equivalent or similar to guideline
OECD Guideline 102 (Melting point / Melting Range)
not specified
GLP compliance:
not specified
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Reference substance name:
oxo[(oxoalumanyl)oxy]alumane; silanedione
EC Number:
Cas Number:
Molecular formula:
amorphous glass Si(n)O(3n+1) polymeric anions bonded to Zr and Al(3+)
oxo[(oxoalumanyl)oxy]alumane; silanedione
Test material form:
solid: fibres
Details on test material:
- Name of test material (as cited in study report): Refractory Ceramic Fibre (RCF)
- Substance type: Fibre
- Physical state: Solid
- Analytical purity: assumed to be 100%
- Impurities (identity and concentrations): none
- Lot/batch No.: BG-19-X99-6484
- Stability under test conditions: Indefinitely stable
- Storage condition of test material: room temperature, dark
Specific details on test material used for the study:
ASW sample milled into a powder, 50 mg of powder used

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
> 350 °C

Any other information on results incl. tables

Polyethylene oxide used as a control sample in this case as it has a clear endothermic peak, due to melting. The peak is clearly visible from around 70 °C. In comparison the ASW shows a static line, including that below 350 °C, these fibres are not melting.

Applicant's summary and conclusion

The ASW shows a static line, including that below 350°C, these fibres are not melting below 350 °C.