Oxalic Acid is a naturally occurring compound found in many plants, including spinach, rhubarb, and beets. It is a colorless, crystalline substance that can form salts known as oxalates. In small amounts, oxalic acid is generally safe for consumption, but in larger quantities, it can be toxic and may lead to health issues, such as kidney stones. In addition to its presence in food, oxalic acid is used in various industrial applications, including cleaning agents and rust removers. It can also be found in some household products. Proper handling is essential, as it can cause skin irritation and other harmful effects if ingested or inhaled.