Chemical accessibility refers to the ease with which a chemical compound can be obtained or synthesized for use in research, industry, or medicine. The accessibility of a chemical is influenced by factors such as its availability in nature, the cost and complexity of its synthesis, and any legal or regulatory restrictions on its production or use. Chemical accessibility is a crucial consideration for scientists and engineers working in fields such as drug discovery, materials science, and environmental remediation. Access to specific chemicals can be the difference between success and failure in these fields, making it essential to understand the factors that influence chemical accessibility.