C.I. Mordant Blue 8

1,5-Dinitroanthracene-9,10-dione or 1,8-Dinitroanthracene-9,10-dione?and 1,5-Dinitroanthracene-9,10-dione?mixture with concentrated sulfuric acid, sulfur and Boric acid treatment, and then into sodium salt.

purplish blue (chromium). Slightly soluble in ethanol, in concentrated sulfuric acid to dark purple, red brown after diluted.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO		3-4	3		4-5	3
AATCC		6-7	3		3	3