with the method in room temperature treatment 2,5-Bis(4-nitrobenzamido)benzenesulfonic acid.
Properties and Applications
yellow. Soluble in water for green light yellow, slightly soluble in alcohol. The strong sulfuric acid for green light yellow, diluted for extremely shallow yellow. The dye solution to join strong hydrochloric acid have shallow green light yellow precipitation; With strong sodium hydroxide solution have light yellow precipitation; Add 10% sodium hydroxide solution colour and lustre is unchanged.