2-Hydroxy-1,4-naphthoquinone (CAS 83-72-7)

2-Hydroxy-1,4-naphthoquinone, commonly known as lawsone, is a naturally occurring quinone found in the henna plant, *Lawsonia inermis*. This compound is distinguished by its naphthoquinone backbone and a hydroxyl group at the second position, which endows it with unique redox properties. Lawsone operates primarily through redox cycling, a process that involves its constant reduction and oxidation, enabling it to form strong complexes with proteins, which is essential for its use as a natural dye in the textile and cosmetic industries for hair and fabric coloring. Beyond its dyeing applications, lawsone has been a valuable subject in chemical research, particularly in studies related to organic synthesis and polymer chemistry. Its reactive quinone structure allows researchers to explore complex organic reactions and the development of synthetic pathways for advanced materials. Additionally, its interaction with metal ions offers insights into corrosion inhibition, suggesting potential applications in materials science for protecting metals against corrosion. This versatility makes lawsone a critical compound in both industrial applications and fundamental research, contributing significantly to advancements in materials science, textile engineering, and environmental sustainability.