Characteristics: white needle-like or hexagonal crystals. Almost odorless. Melting point 260 ℃ (decomposition). In hot alkaline solution decomposition. Soluble in dilute mineral acid and alkaline solution. Extremely difficult to dissolve in water and ethanol. 



 Uses: Widely used in medicine, food and cosmetics industries, cystine can promote the redox ability of the body cells to increase the development of white blood cells and prevent pathogens such as the role, mainly used for hair loss disease, is also used for dysentery, typhoid, influenza and other acute infectious diseases , asthma, neuralgia, eczema and various toxic disorders. It is not only to prevent liver cirrhosis and other liver disease medicine, and to prevent skin aging