Xanthates-also known as "xanthogenates"-are solid yellow powders characterized by a pungent odor; they are toxic, flammable, and prone to deliquescence in the presence of moisture. Chemically unstable, they undergo accelerated decomposition upon contact with salts and are readily soluble in water, acetone, and alcohols. These substances are known to cause damage to the liver, kidneys, and nervous systems of both humans and animals. Xanthates were first invented by Keller in the 1920s. The invention of xanthates provided a tremendous impetus to the advancement of mineral processing technologies; various types of xanthates serve as collectors in froth flotation processes-an application that accounts for their largest volume of usage. Furthermore, sodium ethyl xanthate and potassium ethyl xanthate find utility as precipitants in hydrometallurgy and as pharmaceutical intermediates. In the agricultural sector, they are employed as crop desiccants; when sprayed at an appropriate stage prior to harvest, they rapidly reduce the moisture content of the grain husks, thereby facilitating the threshing process.
Due to its versatility, xanthan gum is widely used in the food industry as a thickening agent, emulsion stabilizer, and suspending agent-for instance, in sauces, beverages, and ice cream. It is also frequently employed in the petroleum extraction, cosmetics, and pharmaceutical industries to modify fluid properties or to formulate controlled-release preparations. Furthermore, xanthan gum serves as an eco-friendly material and a biomedical carrier, demonstrating broad potential in both scientific research and engineering applications.
