To facilitate the chemistry education community in locating and evaluating published assessment instruments, the Chemistry Instrument Review and Assessment Library (CHIRAL) encompasses a number of resources. First and foremost, CHIRAL contains a catalog of over 500 assessment instruments that is easily searchable, allowing for the identification of instruments within a given domain, topic, or format. Each instrument listing in CHIRAL includes metadata (intended population, language, number of items, etc.), a bibliography of studies that have used the instrument and reported evidence for validity and reliability, a catalog of the reported evidence, a panel review report providing a synthesis of the reported validity and reliability evidence (for select instruments), and a glossary of common terms used in psychometric evaluations. This paper presents the purpose of CHIRAL and provides details about its development.