Acid Blue 138

Preparation

1-Amino-2,4-dibromoanthracene-9,10-dione and 4-Dodecylbenzenamine reaction, then and sodium sulfite, function, stlfonation, and translated into sodium salt.

Properties and Applications

blue. Blue powder, soluble in water. The strong sulfuric acid for green light blue. Meet copper ions becomes shallow turn green, encounter chromium ion turn green turn dark. Mainly used for silk printing and dyeing, also used for wool and polyamide fiber dyeing.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	5-6	4	4-5	5	4-5	4-5	5	5