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EC number: 304-802-4 | CAS number: 94279-56-8
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- other: Expert Assessment
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Principles of method if other than guideline:
- Assessment
- Type of method:
- other: Assessment
- Remarks on result:
- other: >500 C
- Conclusions:
- This substance is a UVCB characterised as Silicic acid (H4SiO4), zirconium(4+) salt (1:1), reaction products with sodium hydroxide (304-802-4, 94279-56-8). It is the product of a reaction between Zircon (EC no 239-019-6) and sodium hydroxide. In common with other or similar substances and has a very high melting point; from theoretical considerations, the melting point would be expected to be significantly in excess of 500°C (873K); this is evidenced by the fact that the finished products emerges from a furnace at >500°C in a solid form. The melting point would be almost impossible to measure with any degree of accuracy. The melting point of this substance may therefore be stated as >500°C.
Reference
Assessment
Description of key information
The melting point of this substance is>500°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 500 °C
Additional information
This substance is an inorganic silicate and, in common with other or similar substances and has a very high melting point; from theoretical considerations, the melting point would be expected to be significantly in excess of 500°C (873K); this is evidenced by the fact that the finished products emerges from a furnace at>500°C in a solid form. The melting point would be almost impossible to measure with any degree of accuracy. The melting point of this substance may therefore be stated as>500°C.
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