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What is TiO2?

TiO₂ is the chemical formula for titanium dioxide. It’s a very common white powder that looks a bit like ultra‑fine white chalk dust. It has no smell or taste, and it’s well‑known for its bright whiteness and strong ability to make things look more opaque.

TiO2 is often found in many common products, though the specific purpose can vary by industry. You can think of it as a “white base layer” that helps a product look cleaner, whiter, and more even.

It’s one of the most widely used and trusted white pigments worldwide.

What are the two types of TiO2?

Titanium dioxide mainly exists in two crystal forms: rutile and anatase. Rutile TiO2 is the more stable form, with stronger hiding power and better resistance to weather, so it is widely used in outdoor coatings and plastics. Anatase TiO2 has lower opacity and is often chosen for indoor paints, paper, and certain specialty applications.

What is rutile titanium dioxide?

Rutile titanium dioxide is the rutile crystal form of TiO₂, widely recognized as the most stable and durable type of titanium dioxide. It provides excellent hiding power, strong resistance to ultraviolet light, and high durability under outdoor conditions.

Because of these properties, rutile TiO2 is commonly chosen as a white pigment in coatings, plastics, and other demanding applications. It is regarded worldwide as a reliable material that delivers consistent performance over time.

What is the color of rutile TiO2?

Pigment‑grade rutile TiO₂ is a bright, clean white powder—the kind of white you see in many coatings, plastics, and inks.

The raw mineral, though, doesn’t look white at all. As a crystal, rutile is usually brown to reddish‑brown, and in some cases it can appear almost black because of trace elements in the ore. During processing, these impurities are removed, leaving behind the high‑purity white pigment used in industry.

Simply put, natural rutile tends to be dark, while the rutile TiO2 used as a pigment is clearly and consistently white.

What is titanium dioxide used for?

Titanium dioxide is mainly used as a white pigment to make products brighter, more opaque, and durable. You’ll find it in paints, plastics, paper, inks, and textiles, where it helps improve whiteness and appearance. It’s also common in packaging, cosmetics, and other applications that require UV protection.

What is titanium dioxide rutile used for?

Rutile titanium dioxide is widely used because of its excellent durability, strong opacity, and resistance to weathering. These properties make it a preferred choice for outdoor applications such as architectural and industrial coatings, plastics, and construction materials, where long-term performance matters.

It is also commonly found in packaging materials, automotive coatings, printing inks, and synthetic fibers, helping deliver consistent whiteness, opacity, and protection over time.

What is titanium dioxide used for in plastic?

Titanium dioxide is added to plastics to give them whiteness, opacity, and brightness. It also improves UV resistance and weatherability, helping materials keep their color and strength over time. Common applications include PVC, PE, PP, PS, PET, ABS, PC, PA, PBT, and SAN, as well as plastic masterbatch, where TiO₂ enhances appearance, prevents degradation, and extends product life in packaging, construction, automotive, and consumer goods.

What is the role of titanium dioxide in coatings?

Titanium dioxide is used in coatings to provide whiteness, opacity, and brightness. It delivers strong hiding power, improves UV resistance and durability, and helps coatings keep their color over time. TiO2 is essential in architectural, industrial, automotive, and protective coatings where long‑lasting appearance and performance are required.

What is the TiO2 content of rutile?

Rutile titanium dioxide pigment typically contains about 92–98% TiO₂, with the rest made up of small amounts of zirconia and alumina coatings, and sometimes silica or other surface treatments to improve durability and dispersion.

Does titanium dioxide react with chlorine?

No. Titanium dioxide is chemically stable and does not react with chlorine under normal conditions. Chlorine is only involved in the chloride production process, where titanium ores are converted into titanium tetrachloride (TiCl₄) and then oxidized to form TiO₂. Once produced, TiO2 is inert and stays stable in everyday use.

Is titanium dioxide pigment safe?

Titanium dioxide (TiO₂) pigment has long been used in paints, coatings, plastics, and inks, and in these applications it is generally considered safe. The pigment is stable, insoluble, and does not pose a health risk when handled properly.

For food and cosmetics, rules differ. The EU banned TiO2 as a food additive (E171) in 2022, while the U.S. FDA still allows it in food at low levels. In cosmetics, including sunscreens, TiO2 remains widely permitted as a physical UV filter.

To put it simply, titanium dioxide pigment is safe in paints and cosmetics, but food use depends on local regulations.

What do you do with pigment powder?

Pigment powder is used to provide color, whiteness, and opacity. It is mixed with binders or resins to make products such as paints, plastics, rubber, paper, and printing inks, improving appearance and coverage at a lower cost.

What is the chloride process of TiO2?

The chloride process is a modern way to make titanium dioxide. Titanium ores like ilmenite or rutile are treated with chlorine at high temperatures to form titanium tetrachloride (TiCl₄), which is then purified and oxidized into TiO₂. Compared with the sulfate process, this method produces a purer pigment and is generally considered more environmentally friendly.

What is the process of TiO2 production?

Titanium dioxide is mainly produced using two methods: the sulfate process and the chloride process.

• Sulfate process: Titanium ores are dissolved in sulfuric acid and processed to yield TiO₂. It’s the older method and still widely used, though it generates more waste.
• Chloride process: Titanium ores like rutile or ilmenite are reacted with chlorine at high temperatures to form titanium tetrachloride (TiCl₄), which is purified and oxidized into TiO₂. This method produces a purer pigment and is generally more environmentally friendly.

Together, these methods supply TiO2 used in paints, plastics, paper, textiles, rubber and many other products.