Molecular Formula:C₃₀H₂₃N₅Na₂O₈S₂

Molecular Weight:691.64

Properties and Applications: blue-purple. Soluble in water for red light purple, soluble in soluble fiber element, slightly soluble in alcohol, insoluble in other organic solvents. The strong sulfuric acid for blue-ray green, purple precipitation after diluted; In nitric acid solution for the red light in brown. The dye solution to the strong hydrochloric acid has the purple precipitation; cotton, viscose, silk dyeing, and printing, also can be used for paper color, can also be used in leather color.