According to the International Agency for Research on Cancer IARC. titanium dioxide is classified as Class 2B. meaning it is likely to cause cancer in humans. This determination is based on studies showing that inhaling the dust has led to respiratory tract cancer in rats. It should be noted. however. that the IARC points out the limited evidence in humans and recommends further research. While not all exposure to titanium dioxide may be harmful. caution may be necessary. particularly in occupations with significant levels of dust exposure.

Polypropylene (PP) and Propylene Glycol (PG) are distinct substances with different applications and chemical properties. Polypropylene is a thermoplastic polymer, widely used in the production of plastics for packaging, textiles, automotive components, and various consumer goods due to its resistance to heat and fatigue. On the other hand, Propylene Glycol is a colorless, viscous, organic compound, belonging to the alcohol family. It's primarily utilized in the food and beverage industry as a food additive, in pharmaceuticals as a solvent, and in personal care products for its moisture-retaining properties. While both are derived from propylene, their structural differences lead to their diverse usages and characteristics, making PP ideal for durable goods and PG suited for applications requiring solvency and moisture retention.

Polypropylene is a versatile plastic widely used in medical applications due to its excellent chemical resistance, low moisture absorption, and ability to be sterilized. It's utilized in a range of medical devices including syringes, vials, and containers for medical solutions. Additionally, polypropylene is used in surgical instruments, implantable devices, and in sutures, as it is non-reactive with bodily fluids and tissues, reducing the risk of infections. Its lightweight and durability also make it ideal for disposable items, cutting costs and enhancing patient safety by ensuring sterility. Furthermore, polypropylene's flexibility and moldability enable the creation of custom medical components tailored to specific medical needs, highlighting its importance in advancing medical technology and patient care.