[{"from": "human", "value": "Provide a brief overview of this molecule. [Na+1].[Cl-1]"}, {"from": "gpt", "value": "The molecule is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. Sodium chloride is the primary salt in seawater and in the extracellular fluid of many multicellular organisms. It is listed on the World Health Organization Model List of Essential Medicines."}]