Titanium dioxide is recognized for its non-toxicity, optimal opacity, whiteness, and brightness, making it considered the best-performing white pigment in the world today. Titanium white exhibits strong adhesion, resists chemical changes, and remains permanently white.
Chemical Properties of Titanium Dioxide
| Property | Value |
|---|
| Foreign Name | Titanium Dioxide |
| Aliases | Titanium White, Titania, Pigment White 6 |
| Chemical Formula | TiO2 |
| Molecular Weight | 79.866 |
| CAS Number | 13463-67-7 |
| EINECS Number | 236-675-5 |
| Melting Point | 1840°C |
| Boiling Point | 2900°C |
| Solubility | Soluble in hot concentrated sulfuric acid, hydrochloric acid, and nitric acid |
| Density | 4.26 g/cm³ |
| Appearance | White amorphous powder |
| Safety Description | S2, S25, S26, S36/37 |
| Hazard Symbols | Xn |
| Hazard Description | R10, R20/21/22, R36/37/38 |
| Main Crystal Types | Rutile, Anatase |
| Refractive Index | 2.76-2.55 |
| Mohs Hardness | 6-7 (Rutile), 5.5-6 (Anatase) |
| Capacitance | 114-31nF |
| Linear Expansion Coefficient | 25/℃ |
| Thermal Conductivity | 1.809-10.3 |
| Oil Absorption | 16-48, 18-30 |
| Properties | Semiconductor |
Product Grade and Applications
- Industrial Grade:
- Used in industries like coatings, plastics, rubber, and paper.
- Known for its high cost-effectiveness and suitability for mass production.
- Available in various specifications such as R-902 and R-900.
- Food Grade:
- Utilized in the food, pharmaceutical, and cosmetics industries.
- Non-toxic, tasteless, colorless, and fine particle characteristics make it ideal for the food industry.
- Commonly used as a white coloring agent in high-end cosmetics.
- Pharmaceutical Grade:
- Primarily used in the pharmaceutical and biotechnology fields.
- Characterized by high purity, white crystalline appearance, and absence of heavy metal contamination.
- Available in specifications such as USP31 and USP32.
- Photocatalytic:
- Used in wastewater treatment, air purification, and photocatalytic optimization.
- Exhibits unique photocatalytic properties for precise decomposition and treatment of organic compounds and pollutants.
- Nano Grade:
- Consists of micron and nano-sized titanium dioxide particles.
- Features high surface area, strong photocatalytic activity, chemical stability, and UV resistance.
- Finds applications in solar cells, ceramics, and dye-sensitized solar cells.
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