C.I. Direct red 42

C.I. Direct red 42 Chemische Eigenschaften,Einsatz,Produktion Methoden

• synthetische

  4-(4-Aminophenyl)benzenamine double nitriding, first and 6-Aminonaphthalene-1,3-disulfonic acid?coupling, and then in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

• Properties and Applications

  dark blue light red. Soluble in water for product red, slightly soluble in ethanol for shallow peachblossom. The strong sulfuric acid in blue, diluted for Shallow red time The dye solution to join strong hydrochloric acid for red light brown, have precipitation; Add thick sodium hydroxide solution for orange brown.
  

  Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
  				Fading	Stain	Fading	Stain
  ISO	3	5	1	1		1-2

C.I. Direct red 42 Upstream-Materialien And Downstream Produkte