Benzo[h]benz[5,6]acridino[2,1,9,8-klmno]acridine-8,16-diol, bis(hydrogen sulfate) (ester), disodium salt

(a) in the presence of pyridine, treated with chlorosulfonic acid C.I. Vat Yellow 1??leuco; (b) in pyridine using metals (such as copper, iron, zinc, etc.) and sulfur trioxide source (such as sulfur trioxide, chlorosulfonic acid or chlorosulfonic acid ester, etc.) processing C.I. Vat Yellow 1?. In both cases, go through the addition of a base, insolubles were filtered off, the pyridine was removed, and the salting out into the line.

red light yellow.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	2	5	6	5	4-5	5	5
AATCC	3	5	2-3	4	4-5