6-Amino-11-chloronaphth[2,3-c]acridine-5,8,14(13H)-trione

1-Amino-4-bromo-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid and 4-Chloroanthranilic acid condensation, cyclization and, at the same time, remove sulfonic group.

6-Chloro-2-amino-3,4-phthaloylacridone , Indanthren Turquoise Blue GK, is prepared from 1-amino-4(2'- carboxy-5'-chlorophenylamino)anthraquinone- 2-sulfonic acid by ring closure in weak oleum and cleavage of the sulfonic acid group .

green light blue. In concentrated sulfuric acid to orange, dilution after yellow; In the basic insurance powder solution for dark purple; In the acidic insurance powder solution for yellow.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	4-5	3-4	7	4	3