Yellow prussiate of potash, also known as potassium ferrocyanide, is a yellow crystalline salt commonly used in the food industry as an anti-caking agent and as a color enhancer for blue and green pigments. It is also used in the production of dyes, pharmaceuticals, and the manufacturing of high-quality steel. Synonyms for yellow prussiate of potash include potassium hexacyanoferrate (II), potassium ferrocyanide trihydrate, and tetrapotassium ferrocyanide. Despite having multiple names, this compound is known for its ability to prevent the clumping and hardening of powdered foods, making it a popular additive in the food industry.