Properties and Applications
orange. Melting point: 165 ~ 166 ℃. Soluble in water for orange, soluble in ethanol, acetone and Cellosolve. In concentrated sulfuric acid to yellow, to orange after diluted; In concentrated hydrochloric acid for red solution, and then into orange. Dye aqueous solution to join hydrochloric acid to red solution; With sodium hydroxide have yellow precipitation
