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SIDS INITIAL ASSESSMENT PROFILE CAS No . 13463-677 Chemical Name Titanium dioxide Structural Formula SUMMARY CONCLUSIONS OF THE SIAR
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2013 |
| Abstract | Titanium dioxide exists in three different crystallographic structures: rutile, anatase and brookite. Common crystalline forms are anatase and rutile or a mixture of both forms. The crystal form is specified below if the information is available. Anatase forms brown tetragonal crystals, brookite forms white orthorhombic crystals, and rutile forms white tetragonal crystals. They have unit-cell parameters with a=b=4.5937 Å and c=2.9581 Å (rutile); a=b=3.7842 Å and c=9.5146 Å (anatase); a=9.16 Å, b=5.43 Å and c=513 Å (brookite). The melting points of titanium dioxide are 1560 °C (anatase) and 1,843 °C (rutile) and the boiling point is 2,500-3,000 °C. It has a density of 4.23 g/cm (rutile), 3.90 g/cm (anatase) and 4.13 g/cm (brookite). Titanium dioxide is insoluble in water, hydrochloric acid, dilute sulphuric acid, nitric acid, and alcohol. It is soluble in hot concentrated sulphuric acid and hydrogen fluoride. Oxidation-reduction potential (E) is -0.502 V at 25 °C and 1 atm. Vapour pressure and partition coefficient are not applicable to metal-containing inorganic oxide substances. This inorganic substance does not contain relevant functional groups for which an assessment of the dissociation behaviour would be applicable. |
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| Alternate Webpage(s) | https://hpvchemicals.oecd.org/UI/handler.axd?id=1f6be49d-48b6-4909-8e0d-a6f5e48503d3 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
