Vat Red 31

Preparation

1-Amino-9,10-dioxo-9,10-dihydroanthracene-2-carbonyl chloride?and O-dichlorobenzene hydrazine?condensation, with fuming sulfuric acid dehydration cyclization.

Properties and Applications

blue light red. Blue light red powder. Alkaline reduction leuco for caramel, acid reduction leuco for yellow brown. Mainly used for dye spell with red light grey or brown, can be used for cotton direct printing. Also can be used in the manufacture of Vat Blue ER, instead of ice dye dyeing flag when a little dark red color.

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