tetrasodium 2-[1-amino-9,10-bis(sulphonatooxy)-2-anthryl]anthra[2,3-d]oxazole-5,10-diyl bis(sulphate)

Preparation

(a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Red 10 leuco ; (b) used in Pyridine metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate) processing ?C.I. Vat Red 10. The above two kinds of circumstances are through with alkali, filter out the insoluble,, remove Pyridine and salting-out.

Properties and Applications

blue-ray red. Red brown powder. Soluble in water, solubility is better. Used for the cotton fabric dyeing as blue-ray red. Dye with neuter or small when cotton with alkaline bath, also can be used for direct printing, the cotton fabric dye printing, discharge printing. Also can be used for silk and wool dyeing and polyester/cotton blended fabric dyeing.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	3	5	6-7	4	4-5	5	5
AATCC	4	5	6	4	4-5