1 4-Naphthoquinone(NAP)
NAP: Easily soluble in hot alcohols, ethers, benzene, chloroform, and carbon disulfide; Dissolved in alkaline solution, it appears reddish brown in color; Difficult to dissolve in cold water; Slightly soluble in petroleum ether. It can evaporate with water vapor and has a benzoquinone odor. Heating to 100 ℃ can sublime.