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EC number: 215-199-1 | CAS number: 1312-76-1
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- other: Handbook data
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Handbook data
- Principles of method if other than guideline:
- Handbook data, no information on test details.
- GLP compliance:
- no
- Type of method:
- other: Handbook data
- Key result
- Melting / freezing pt.:
- 905 °C
- Decomposition:
- no
- Remarks on result:
- other: see Remarks
- Remarks:
- flow point
- Endpoint:
- melting point/freezing point
- Type of information:
- other: General technical information
- Adequacy of study:
- other information
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Collection of data
- Qualifier:
- no guideline available
- Melting / freezing pt.:
- >= 900 °C
Referenceopen allclose all
Due to their glass nature, solid amorphous silicates do not have discrete melting points but rather flow points. They reversibly solidify and soften within a broad temperature range depending on their molar ratio. The given value relates to the flow point. The softening point is 700°C.
Due to their glass nature, solid amorphous silicates do not
have discrete melting points but rather flow points. They
reversibly solidify and soften within a broad temperature
range depending on their molar ratio. Potassium silicate
lumps start to soften at 700°C and reach the flow point at
900°C. Aqueous silicate solutions have a melting point only
slightly lower than that of water.
Description of key information
905 °C (flow point)
Key value for chemical safety assessment
Additional information
Due to their glass nature, solid amorphous silicates do not have discrete melting points but rather flow points. They reversibly solidify and soften within a broad temperature range depending on their molar ratio. Potassium silicate lumps start to soften at 700 °C and reach the flow point at 900 °C. Aqueous silicate solutions have a melting point only slightly lower than that of water.
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