Chemicals are substances with a distinct molecular composition that is produced through a chemical process or occurs naturally. These substances can be elements or compounds, and they undergo various interactions, reactions, and transformations, playing a crucial role in our daily lives and industries. In our modern world, chemicals are indispensable components in numerous sectors, including manufacturing, agriculture, healthcare, energy, construction, and transportation. They are used for producing materials, fuels, pharmaceuticals, fertilizers, plastics, cosmetics, cleaning agents, and much more.

However, it's essential to handle chemicals responsibly due to potential hazards they may pose to human health, the environment, and property. Proper handling, storage, transportation, and disposal of chemicals are critical to ensure safety and prevent adverse impacts. The study and management of chemicals fall within the realm of chemistry, which involves understanding their properties, composition, reactions, and behavior. As we continue to advance technologically and scientifically, the responsible and sustainable use of chemicals remains a critical consideration for a better and safer world.