There is no harm. Oxalic acid can be found everywhere in nature, and often exists in the cell membrane of plants such as Funiu flower, sheep hoof, Oxalis, Rumex, etc. in the form of oxalate. Almost all plants contain calcium oxalate. Oxalic acid is a common component in plants, especially herbs, and mostly exists in the form of potassium salt or calcium salt. Begonia and banana exist in the form of free acid.

Oxalic acid can also help plants protect themselves from toxic ions. For example, when the root system of buckwheat is damaged by aluminum ions, it will release a lot of oxalic acid. These oxalic acids will "bind" (chelate) aluminum ions and reduce the damage to plants.

Use of oxalic acid

1, as bleaching agent

Oxalic acid is mainly used as reducing agent and bleaching agent, in the production of antibiotics, borneol and other drugs, as well as solvents for extracting rare metals, dye reducing agents, tanning agents and so on. Oxalic acid can also be used to produce Co-Mo-Al catalyst, clean metal and marble, and bleach textiles. Used in metal surface cleaning and treatment, rare earth element extraction, textile printing and dyeing, leather processing, catalyst preparation, etc.

2, as a reducing agent

In the organic synthesis industry, it is mainly used to produce hydroquinone, pentaerythritol, cobalt oxalate, nickel oxalate, gallic acid and other chemical products.