4471-37-8

(a) in the presence of Pyridine , with Chlorosulfonic acid treatment ?C.I. Vat Green 3 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing ?C.I. Vat Green 3. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

deep green. Navy blue powder. Soluble in water, good solubility. Have peroxide faults, make color shade darker. Dyeing cotton fiber can be in weak alkaline dyeing bath, affinity medium.?Staining with sodium nitrite, color faster. In order to avoid peroxide urea or thiourea may be used. Dyeing and padding can be.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	4-5	4-5	8	4-5	4-5	4	4-5
AATCC	5	4-5	8	4-5	4-5