Caustic Potash is the common name for Potassium Hydroxide (KOH), a strong inorganic base that appears as a white, odorless solid or as a clear, colorless solution when dissolved in water. It is highly caustic, hygroscopic, and soluble in water and alcohol, generating heat upon dissolution. It is chemically similar to sodium hydroxide (NaOH) but is often preferred in applications requiring potassium rather than sodium.