The Significance of CAS Number for Titanium Dioxide

The Chemical Abstracts Service (CAS) number is a unique numerical identifier assigned to every chemical substance, which serves as a key reference for researchers, manufacturers, and regulatory agencies worldwide. Titanium dioxide, known by its CAS number 13463-67-7, is one of the most widely used chemicals in various industries. This article explores the significance of the CAS number for titanium dioxide, its applications, and its safety considerations.

Understanding Titanium Dioxide

Titanium dioxide (TiO2) is a white pigment widely utilized due to its excellent brightness and high refractive index. It occurs naturally in various forms, including rutile, anatase, and brookite, with rutile being the most common form used in commercial applications. Titanium dioxide is typically produced through two primary processes the sulfate process and the chloride process, both resulting in the same CAS number.

Applications of Titanium Dioxide

The applications of titanium dioxide are extensive and encompass various industries

1. Paints and Coatings One of the primary uses of titanium dioxide is in the manufacture of paints, coatings, and inks. Its high opacity and durability make it ideal for producing vibrant, long-lasting finishes.

2. Plastics In the plastics industry, titanium dioxide acts as a colorant and UV stabilizer. It enhances the whiteness and brightness of plastic products while providing protection against degradation from UV light.

3. Cosmetics Titanium dioxide is a key ingredient in many cosmetic products, such as sunscreens and foundations. It provides opacity and brightness, while its ability to scatter UV rays makes it a well-regarded component for sun protection.

4. Food Industry Approved for use in many countries as a food coloring agent (E171), titanium dioxide is also utilized to enhance the appearance of food products without altering their taste.

5. Photocatalysis Titanium dioxide has gained attention in environmental applications, particularly in photocatalytic reactions where it helps break down pollutants and harmful microorganisms when exposed to light.

Despite its widespread usage, titanium dioxide has come under scrutiny regarding its safety, particularly when used in aerosol forms or inhalable products. Studies have raised concerns about the potential health risks associated with inhaling titanium dioxide nanoparticles. In response, regulatory agencies, including the European Chemicals Agency (ECHA) and the U.S. Environmental Protection Agency (EPA), have established guidelines to assess its safety profile.

In 2021, the ECHA classified titanium dioxide as a suspected carcinogen by inhalation, leading to tighter regulations regarding its use, particularly in occupational settings. Manufacturers are encouraged to comply with safety guidelines to minimize exposure and ensure safe handling practices.

The Importance of the CAS Number

The CAS number 13463-67-7 serves several critical functions in the context of titanium dioxide

1. Identification The CAS number provides a standard way to identify titanium dioxide across different databases and regulatory frameworks, reducing confusion associated with its various names and forms.

2. Regulatory Compliance Industries that utilize titanium dioxide must navigate various regulations; the CAS number simplifies this process, ensuring companies can identify relevant legal requirements efficiently and accurately.

3. Research and Development For researchers, the CAS number facilitates easy access to a wealth of scientific literature, safety data sheets, and material specifications, fostering innovation and safety improvements.

4. Trade and Supply Chain Management In global commerce, the CAS number helps in tracking, advertising, and regulating chemical substances, enabling a consistent approach to trade agreements and safety standards.

Conclusion

Titanium dioxide, identified by its CAS number 13463-67-7, plays a vital role in numerous industries due to its unique properties and versatility. As discussions about safety and regulatory compliance continue to evolve, the CAS number remains an essential tool for identification, ensuring that users from researchers to manufacturers can navigate the complex landscape of chemical substances effectively. Its significance cannot be overstated in promoting safe practices and fostering scientific advancement.