In college-level microbiology classes, lab coats are often required as part of the personal protective equipment (PPE) to ensure a safe learning environment. These classes involve handling microbes, some of which may be potentially harmful, as well as using substances that could stain or damage clothing. Lab coats provide a barrier against contamination, reduce the spread of microbes, and protect personal clothing. Additionally, wearing lab coats helps inculcate a culture of safety and professionalism in the laboratory setting, making them an essential component of laboratory attire in microbiology courses.

Low density polypropylene (LDPE) is not inherently hard to recycle, but its recycling rate is lower compared to other plastics like PET or HDPE. This discrepancy is largely due to collection and sorting challenges. LDPE items, such as plastic bags and wraps, are lightweight and can clog machinery, complicating the recycling process in traditional facilities. Efforts to improve LDPE recycling involve specialized collection programs and advances in sorting technologies. Encouraging consumers to drop off LDPE materials at designated recycling centers or store drop-off points can enhance its recycling rate. Additionally, more companies are exploring ways to incorporate recycled LDPE into their products, creating a greater demand for this recycled material.

In terms of hazard classification. titanium dioxide is classified as a substance of two classes CARC.2. H351 by the EU in 2020. It has a HS code of 28.23 million. Those with an aerodynamic diameter of 10 m or smaller form titanium dioxide or mixtures of titanium dioxide powders with a hazard classification of more than 1%.