Sodium thiocyanate is a chemical compound with the formula NaSCN. It appears as a white, crystalline solid and is highly soluble in water. This compound is often used in various applications, including as a reagent in chemical analysis and in the production of certain dyes and pharmaceuticals. In addition to its industrial uses, sodium thiocyanate plays a role in biological systems. It can act as a source of thiocyanate ions, which are involved in various physiological processes. However, excessive exposure to sodium thiocyanate can be toxic, so safety precautions are important when handling it.