Pigment White 6, known chemically as Titanium dioxide (TiO2), is widely used in various industries, including food, pharmaceuticals, and cosmetics, as well as in paints and coatings. Its safety has been extensively studied. The International Agency for Research on Cancer (IARC) has classified it as a Group 2B carcinogen, which means it is "possibly carcinogenic to humans" but this classification is primarily based on inhalation studies in rats at very high concentrations that do not typically represent exposure levels for humans through ingestion or skin contact. Regulatory bodies around the world, including the US Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA), have concluded that titanium dioxide is safe for use in foods, drugs, and cosmetics under current usage conditions. However, it's worth noting that in 2021, France banned the use of titanium dioxide in food products based on the precautionary principle, indicating a varying degree of regulatory caution depending on geographic location. With any chemical agent, ensuring that exposure levels remain within safe limits is critical. Consumers and workers who might be exposed to TiO2 in its powder form should ensure proper protective measures are in place to minimize inhalation.

The term "SAE" refers to the Society of Automotive Engineers, which sets various standards for the automotive industry, including motor oil viscosity grades. When you see "SAE" in the context of motor oil, it's indicating the oil's viscosity grade, not its composition. Therefore, an oil can be SAE graded and either full synthetic, synthetic blend, or conventional. Full synthetic oils are made from chemically synthesized base oils and offer superior performance and protection compared to conventional oils. To determine if an oil is full synthetic, look beyond the SAE rating and search for "full synthetic" on the label. Synthetic oils generally provide better high and low-temperature performance, longer engine life, and improved fuel efficiency compared to their conventional counterparts.

Polymers exhibit diverse physical characteristics based on their molecular structure and composition, especially in relation to their glass transition temperature (Tg). Below the Tg, polymers are generally rigid and hard since the molecular chains have limited motion, essentially being in a glassy state. Above the Tg, they transition to a rubbery or soft state as the thermal energy allows for increased molecular mobility. However, the term "soft tacky" typically applies to behavior above Tg when the polymer exhibits viscoelastic properties. Below Tg, the limited molecular mobility due to low temperatures renders polymers more solid and less deformable rather than soft or tacky. This behavior can vary significantly across different polymer types, influenced by their chemical makeup and the presence of any plasticizers or fillers.