Metüleensinine

Metüleensinine is a synthetic organic compound and a methene dye. It is chemically known as methylene blue or methylthioninium chloride. It has the chemical formula C16H18ClN3S. Metüleensinine is a dark green powder that dissolves in water to form a blue solution. It is a redox indicator and is used in various analytical chemistry applications.

Historically, metüleensinine found use as a textile dye and in early medical applications. It has been used as an antiseptic and in the treatment of certain medical conditions, though its therapeutic use has largely been superseded by more modern treatments. In laboratories, it is commonly employed as a stain for biological specimens, particularly for visualizing cell nuclei and bacteria under a microscope. Its ability to change color depending on the oxidation state of its environment makes it useful as a redox indicator in titrations. Metüleensinine is also used in water testing to assess the oxygen levels in aquatic environments. It is generally considered to have low toxicity when used appropriately.