The Significance of Titanium Dioxide Understanding its CAS Number

Titanium dioxide, often referred to by its chemical formula TiO2, is a compound that has established its importance across a myriad of industries, including cosmetics, food, paints, and construction. This white, opaque powder is widely celebrated for its excellent opacity, brightness, and ability to filter ultraviolet light. The Chemical Abstracts Service (CAS) number for titanium dioxide is 13463-67-7, which helps in cataloging and identifying this compound in various databases and regulatory frameworks.

Chemical and Physical Properties

Titanium dioxide is composed of titanium and oxygen, and it exists mainly in three crystalline forms rutile, anatase, and brookite. Among these, the rutile form is the most stable and commonly used in commercial products. Rutile's high refractive index makes it an ideal additive for products requiring opacity such as paints and coatings. The anatase form has photocatalytic properties that are leveraged in environmental applications, such as air purification and self-cleaning surfaces.

Titanium dioxide is also non-toxic and chemically stable, which makes it a safe choice for various consumer applications. Its UV filtering ability makes it especially valuable in sunscreens, providing protection from harmful UV radiation without causing skin irritation.

1. Cosmetics and Personal Care Due to its ability to scatter light effectively, titanium dioxide is commonly used in sunscreens and mineral makeup as a physical sunscreen agent. Its safety profile and efficacy in protecting the skin from UV rays have led to its widespread adoption in the cosmetics industry. Additionally, it helps improve the texture and appearance of products, offering a matte finish.

2. Food Additive Often labeled as E171, titanium dioxide is used in the food industry to enhance the whiteness and brightness of food products, ranging from confections to dairy items. However, its use in food products has come under scrutiny, particularly in the European Union, leading to various regulatory assessments regarding its safety.

3. Paints and Coatings The paints and coatings industry is one of the largest consumers of titanium dioxide. The pigment's ability to maintain color durability and provide excellent coverage has made it a staple in the formulation of high-quality paints. Its properties facilitate applications in exterior and interior paints, industrial coatings, and automotive finishes.

4. Papers and Inks In the paper industry, titanium dioxide is utilized to enhance brightness and whiteness, making it invaluable in the production of high-grade paper products. Similarly, in inks, it ensures color vibrancy and consistency, which is essential for high-quality printing.

5. Construction Materials The construction industry benefits from titanium dioxide in producing concrete and cement. It enhances the durability and aesthetic appeal of construction materials while providing UV and weathering resistance.

Safety and Regulatory Considerations

Despite its numerous benefits, the use of titanium dioxide is not without controversies. Recent studies have indicated potential health risks associated with inhalation of nano-sized TiO2 particles, leading to regulatory scrutiny. Organizations like the European Chemicals Agency (ECHA) and the U.S. Environmental Protection Agency (EPA) are continually evaluating the safety of titanium dioxide in various applications.

As a result, manufacturers are encouraged to adhere to strict guidelines to ensure that titanium dioxide is used safely and responsibly, particularly in consumer products. The ongoing research into its potential risks will play a crucial role in shaping future regulations and usage.

Conclusion

Titanium dioxide, identified by its CAS number 13463-67-7, remains a versatile and widely used compound in various industries. Its unique properties provide essential benefits that enhance product quality, safety, and consumer experience. As research continues to unfold regarding its safety profile and potential implications, it will be critical for stakeholders to remain informed and compliant with evolving regulatory standards. The ongoing balance of utility and safety will determine the future landscape for titanium dioxide applications across different sectors.