Black salt, also known as Kala Namak or Sanchal, is a kiln-fired mineral salt sourced mainly from the Himalayan region of India and neighboring countries. It is composed primarily of sodium chloride, with notable amounts of iron, sulphur, potassium, and trace minerals such as magnesium and calcium. The salt appears as dark crystals that, when ground, range in color from pink to purple, and is recognized for its distinct sulphurous aroma and mildly tangy flavor. Black salt is commonly used in South Asian cuisine as a seasoning and is valued for its unique taste and mineral content.