Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail

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)
GLP compliance:
not specified
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Reference substance name:
silicon(4+) dialuminium(3+) dipotassium hexaoxidandiide
EC Number:
Molecular formula:
SinO(3n-1)2(n-1) polymeric anions ionically bonded to Al3+ and K2+ cations
silicon(4+) dialuminium(3+) dipotassium hexaoxidandiide
Test material form:
solid - liquid: suspension
migrated information: dispersion
Details on test material:
- Name of test material (as cited in study report): Superwool 1400
- Substance type: Inorganic
- Physical state: Solid
- Analytical purity: >99%
- Impurities (identity and concentrations): trace impurities
- Purity test date: March 2011
- Lot/batch No.: BG-11-P19-2563
- Expiration date of the lot/batch: 31/12/2020
- Stability under test conditions: stable
- Storage condition of test material: room temperature, sealed container
Specific details on test material used for the study:
PAS sample milled to powder, 50mg 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 70C . In comparison the PAS shows a static line with no activity, indicating that below 350C , these fibres are not melting.

Applicant's summary and conclusion

PAS fibres show a static line indicating that below 350C there is no melting.