Understanding TiO2 and Its Significance A Focus on CAS Number

Titanium dioxide (TiO2), with the Chemical Abstracts Service (CAS) number 13463-67-7, is a compound that plays a crucial role in various industries due to its unique properties. Its widespread use spans from pigments in paints and coatings to applications in food products and cosmetics. This article delves into the significance of TiO2, exploring its applications, manufactural processes, and the critical importance of its CAS number in chemical regulation and safety.

Chemical Properties and Structure

Titanium dioxide is an inorganic compound composed of titanium and oxygen. It occurs naturally in the minerals anatase, rutile, and brookite. TiO2 is renowned for its high refractive index and its ability to scatter light, which makes it an excellent white pigment. When incorporated into products, TiO2 not only enhances color but also contributes to opacity and brightness. Chemically, it is relatively stable, non-toxic, and has a high melting point, which explains its versatility in various applications.

The majority of TiO2 produced globally is used as a pigment in paints, coatings, and plastics due to its vibrant color and durability. In the paint industry, TiO2 improves the aesthetic quality and longevity of the product. Additionally, it provides UV protection, making paints less prone to fading over time.

In the food industry, TiO2 serves as a colorant (E171), although its use has come under scrutiny in recent years due to potential health concerns arising from nanoparticle forms. In cosmetics, TiO2 is commonly found in lotions and sunscreens, valued for its photoprotective properties, effectively blocking harmful UV rays when applied to the skin.

The photocatalytic properties of TiO2 also enable its use in environmental applications. For instance, TiO2 can catalyze reactions that break down pollutants, thus aiding in water purification and air treatment processes. This functionality positions TiO2 as a valuable component in sustainable technologies aimed at combating environmental challenges.

Regulatory Considerations and Safety

The CAS number 13463-67-7 is critical for the identification and regulation of titanium dioxide across various jurisdictions. Regulatory bodies, such as the Environmental Protection Agency (EPA) in the United States and the European Chemicals Agency (ECHA), rely on CAS numbers to categorize and assess chemicals. The unique CAS number allows for precise tracking of titanium dioxide in scientific literature, safety data sheets, and regulatory submissions.

In light of recent health debates surrounding TiO2, particularly in its nanoparticle form, regulators have increased scrutiny. The International Agency for Research on Cancer (IARC) has classified inhaled titanium dioxide as possibly carcinogenic to humans (Group 2B) based on sufficient evidence of carcinogenicity in animals. As a result, industries utilizing TiO2 must adhere to safety protocols to minimize exposure risks, particularly in occupational settings.

Conclusion

Titanium dioxide (CAS number 13463-67-7) is an indispensable compound across multiple industries, enhancing product quality and safety while offering significant environmental applications. Despite its benefits, ongoing research and regulatory scrutiny necessitate a careful approach to its use, particularly regarding newer forms and their health implications. Understanding the complexities surrounding TiO2, combined with adherence to safety regulations, will ensure that its benefits can be harnessed while minimizing potential risks. As the industry evolves, the role of TiO2 is anticipated to expand, leveraging its properties in innovative and environmentally friendly applications.