PubChem CID

A PubChem CID (Compound Identifier) is a unique number assigned to a specific chemical substance in the PubChem database. It helps researchers and scientists easily find and reference detailed information about that chemical, such as its structure, properties, safety, and uses. Think of it like a library catalog number for chemicals—each CID is unique to one compound, making it simple to locate and differentiate chemicals quickly and accurately. PubChem is a free resource maintained by the National Institutes of Health (NIH) that supports scientific research by providing standardized data about thousands of chemical substances.