A guide to buying titanium dioxide, focusing on comparing rutile and anatase, to help you choose the most suitable titanium dioxide for your application.
I. Two Main Crystal Forms of Titanium Dioxide
| Crystal Form | Characteristics | Whiteness | Hiding Power | Gloss | Weather Resistance | Price | Main Applications |
|---|---|---|---|---|---|---|---|
| Rutile | Stable crystal structure, higher density | High | High | High | Excellent, outstanding light and weather resistance | Higher | Coatings, plastics, exterior building materials, industrial paints, sunscreens |
| Anatase | Looser crystal structure, higher reactivity | High | Moderate | Medium | Lower | Relatively lower | Interior paints, paper whitening, cosmetics, photocatalytic applications (air purification, water treatment, etc.) |
II. Key Selection Points
1. Choose Crystal Form Based on Application
Outdoor or Long-Term Use → Rutile
Strong weather resistance and stability
Resistant to yellowing and UV degradation
Ideal for exterior wall coatings, outdoor plastics, and automotive paints
Indoor or Short-Term Use → Anatase
Higher whiteness, more cost-effective
Suitable for indoor coatings, paper coatings, and general cosmetics
Photocatalytic or Functional Applications → Anatase
High reactivity
Commonly used in air purification and water treatment systems
2. Weather Resistance and Durability Comparison
Rutile > Anatase
Rutile is more suitable for outdoor environments and long-lasting applications
Anatase is recommended where weather resistance is not critical, such as indoor or functional uses
III. Opacity, Whiteness, and Price
1. Opacity and Whiteness
Rutile: Generally offers higher opacity and whiteness compared to Anatase, especially noticeable in thick coatings or large-area applications.
Anatase: Has high whiteness but slightly lower opacity, making it more suitable for thin coatings or interior decorative paints.
2. Price Considerations
Rutile: Higher price, but excellent overall performance; ideal for high-end products and outdoor applications with strict weathering requirements.
Anatase: Lower cost, suitable for price-sensitive indoor products.
IV. Selection Recommendations
Building Coatings (Outdoor, Long-Term Use) → Choose Rutile
Plastic Products (Outdoor, High Weather Resistance) → Choose Rutile
Interior Coatings, Paper Whitening, Cosmetics → Choose Anatase
Photocatalytic and Environmental Applications (Air/Water Purification, etc.) → Choose Anatase
V. Summary Comparison
| Aspect | Rutile | Anatase |
|---|---|---|
| Whiteness | High | High |
| Opacity | High | Moderate |
| Weather Resistance | Strong | Weaker |
| Gloss | High | Moderate |
| Price | Higher | Lower |
| Typical Applications | Outdoor, high durability | Indoor, photocatalytic, functional applications |
Core Principle:
Outdoor or high-durability applications → Rutile
Indoor or functional applications → Anatase