Dear friend If you want to know information and structure of dye first you find MSDS data of the dye. In that you will find CAS No. or C.I name of the dye then afterwards by using these information, search structure of dye by using the link http://www.chemblink.com/

I hope it may be helpful to you....

To answer that question one would need more information, esp. what kind of dye it is (reactive, direct, acid, basic, disperse, etc.). Blue RGB sound like a part of a dye product and could for example be "Remazol Blue RGB" in that case it would be a reactive dye with the CAS No: 128416-19-3 and the Colour Index Name: C.I. REACTIVE BLUE 220. The dye is a copper complex and not easily drawn. If this is the dye you are looking for, send me a message and I can send you the structure.

You can find answer to your questions in my article on my page.

Respected Agnes Seeberger,

Thank you for the response. Below are the details I've regarding the dye.

dye name: Blue RGB

Type: Reactive monoazo dye (monoazo-thats the only detail i got from a paper)

lambda max: 605 nm (as per the UV spectrum i took)

can u help with the structure as per the response u gave to my query?

You can find the structure either in Stains file website (or) World dyes variety website. You can also use this website http://www.ichemistry.cn/cas/.BB.EE.D0.D4.C0.B6 which had similar dye name related to your  mentioned Mono-azo dye category.

The links are attached with this reply.

http://www.ichemistry.cn/cas/.BB.EE.D0.D4.C0.B6

http://www.worlddyevariety.com/reactive-dyes/reactive-blue-203.html