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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01.01.2015 to 31.08.2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: In compliance with ISO 17025

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Principles of method if other than guideline:
The melting point has been analysed according to OECD Guideline 102. The used method was the Differential Scanning Calorimetry (DSC), where the sample was heated from 20 to 600 °C. In addition, the sample was heated in an oven up to 1400 K.
GLP compliance:
no
Remarks:
accreditated method
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
thermal analysis

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): Celitement
- Chemical name: Calcium hydrosilicate
- Physical state: White powder
- pH-value: 10.5
- Expiration date of the lot/batch: 12/2015
- Stability under test conditions: Hydration reaction with water
- Storage condition of test material: Room temperature protected from light, in original container in evacuated desiccator

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
> 1 600 °C
Atm. press.:
ca. 1.013 Bar
Decomposition:
ambiguous
Remarks:
dehydration of some constituents, no real decomposition
Decomp. temp.:
> 50 - < 600 °C
Sublimation:
no

Applicant's summary and conclusion

Conclusions:
Celitement showed dehydration between 50 and 600 °C. At the beginning calcium hydrosilicate (CHS) and calcium silcate hydrate phases (CSH) and at the end calcium hydroxide lost chemical bounded water. The dehydration was not combined with a melting of the powdery substance.