Registration Dossier
Registration Dossier
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EC number: 308-551-1 | CAS number: 98072-94-7 Natural ilmenite ore is concentrated by selective removal of impurities, chiefly iron, to yield a product enriched in titanium dioxide. The process consists of an optional oxidative roast followed by a reductive roasting stage, an acidic leaching stage and washing and drying the product. Alternatively the process consists of selectively chlorinating the iron oxide present in the reduced ore.
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
Melting point of Rutile is 1843 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 843 °C
Additional information
For the evaluation of this endpoint data from one reliable handbook were used as key information. According to the REACH regulation (“ECHA, guidance on information requirements and chemical safety assessment – chapter R.7a”), it is appropriate to use specific handbook data as a reliable data source. A useful reference book containing peer-reviewed physico-chemical data include the CRC Handbook of Chemistry and Physics. Data available from this handbook indicate that Rutile has a melting point of 1843°C.
Furthermore, Synthetic rutile is made from the naturally occurring iron-titanium mineral Ilmenite with the initial pyro-metallurgical process occurring above 1100 °C. The mineral grains do not melt during this process and retain their original shape. Therefore, the melting point as reported in Iluka’s Material Safety Data Sheet for Synthetic rutile, issued November 2006, is above 1000 °C.
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