Titanium Dioxide An Overview Based on its CAS Number

Titanium dioxide, known by its chemical formula TiO₂, is an inorganic compound that has gained significant attention for its diverse applications and important role in various industries. Its identification is facilitated by the Chemical Abstracts Service (CAS) number, which for titanium dioxide is 13463-67-7. This unique identifier plays a crucial role in chemicals' cataloging and research, allowing scientists and engineers to discuss and utilize titanium dioxide unequivocally.

Properties of Titanium Dioxide

Titanium dioxide is a white, opaque powder that is insoluble in water. It naturally occurs in several mineral forms, primarily rutile, anatase, and brookite, each demonstrating unique properties and applications. Rutile is the most stable and commonly used form due to its superior hiding power and UV resistance. Anatase, while less stable, is often employed in photocatalytic applications due to its high activity under UV light. The powder’s high refractive index and its ability to scatter visible light make it an excellent pigment, contributing to its widespread use as a whitening agent in products such as paints, coatings, plastics, and food items.

The multifaceted nature of titanium dioxide allows it to serve in numerous sectors. In the paint and coatings industry, TiO₂ is a critical component due to its bright white color and ability to provide coverage and opacity. The compound is instrumental in producing high-performance paints that resist fading and weathering. In the plastics industry, titanium dioxide enhances the durability of products and prevents yellowing over time.

Beyond aesthetics, titanium dioxide is revolutionizing environmental applications through its role as a photocatalyst. When exposed to UV light, TiO₂ can facilitate chemical reactions that break down organic pollutants, making it valuable in water purification and air treatment systems. Additionally, its use in sunscreens exploits its ability to block UV radiation, protecting the skin from harmful effects. The compound’s safety and efficacy in such products, coupled with its natural occurrence, contribute to its popularity in cosmetics and personal care items.

Health and Environmental Considerations

Despite its benefits, the health and environmental impacts of titanium dioxide have prompted discussions and ongoing research. The International Agency for Research on Cancer (IARC) classified titanium dioxide as possibly carcinogenic when inhaled in large quantities, which has raised concerns primarily surrounding occupational exposure in industries where aerosolization occurs. Regulatory evaluations continue to assess the compound's safety in consumer products, ensuring that exposure levels remain safe for public health.

Furthermore, environmental scientists are studying the effects of titanium dioxide nanoparticles, which are increasingly used in various applications, including sunscreens and food packaging. The potential for these nanoparticles to impact aquatic ecosystems and their interaction with living organisms are critical areas of ongoing research.

Conclusion

Titanium dioxide (CAS Number 13463-67-7) embodies the intersection of utility and ongoing scientific inquiry. Its versatile properties make it an indispensable component across various industries, from manufacturing to environmental technology. As its applications expand, so too does the need for comprehensive studies on its safety, efficacy, and environmental impact. By ensuring responsible use and continuous evaluation, titanium dioxide can maintain its status as a vital material in contemporary technology while prioritizing health and environmental sustainability.