Polypropylene resin falls under the Harmonized System (HS) code classification, which is a standardized nomenclature for the classification of products traded internationally. The HS code for polypropylene, which is a type of thermoplastic polymer used widely in plastics and fibers, typically falls under the category of "Plastics and articles thereof." Specifically, polypropylene resin can be classified under the heading 3902, with more detailed classifications depending on its form and specific applications. For instance, polypropylene in primary forms might be detailed under HS code 390210. It's vital for traders and manufacturers to correctly identify the HS code of their products to comply with international trade regulations, determine tariffs, and facilitate smooth customs procedures. Incorrect classification can lead to delays and penalties.

Generally. titanium dioxide is regarded as safe for use on the skin and is commonly used in sunscreens due to its excellent UV ray protection. The use of large. non-nanoparticle titanium dioxide formulations has been recommended due to concerns about nanoparticles' effects on human health.

Polypropylene is a thermoplastic polymer, appearing as a translucent, white material in its raw form. Its appearance can vary based on its particular application and processing method. For general purposes, it might look like solid, white plastic sheets or pellets. When molded into products, polypropylene can be transparent or colored depending on added pigments. It has a somewhat glossy finish and feels somewhat tougher and more flexible than some other plastics. Due to its resistance to fatigue, it's commonly used in containers, packaging, and textile fibers. Its adaptability means it can be made to look differently - from rugged, opaque containers to clear, lightweight bottles.