Name: Hikari

Message: Good afternoon

My name is Hikari. I am a student who's doing some research about dye.
I've read your excellent site and I need your help.
I need information about reactive orange 84 and the important is the structure molecule of this dye.
I really honor if you want to help me.
Thank you so much.

Sincerely,
Hikari

Colour Index Reactive Orange 84 is described in the Chemical Book website as being an H-E type dye, CAS# 91261-29-9. Its molecular formula is C₅₉H₃₀I₂N₁₄Na₈O₂₆S₈. The full chemical name gives all of the details of its molecular structure, if you can interpret it:  1,5-naphthalene disulfonic acid, 3,3-(2,2-disulfo1,1-biphenyl-4,4-diyl) bisimino(6-chloro-1,3,5-triazine-4,2-diyl) imino(1-hydroxy-3-sulfo- 6,2-naphthalene diyl)azo bis-, octasodium salt. I was not able to find an image showing this structure. As a student you may find it helpful to look at similar dye structures, in order to compare the complete chemical names to illustrations of the dye molecules they describe; my page about the structures of a related class of dyes, the dichlorotriazine, includes many similar structuress.

My web page on Procion H and H-E dyes, includes Reactive Orange 84 in its table and indicates that it is supplied for dye artists by PRO Chemical & Dye as their "Pro H-ER Real Orange". It is also supplied in larger quantities for industrial customers from various factories in Asia, not listed on my site. It is a bifunctional dye, classified as being a bis(aminochlorotriazine) dye. It is a hot water dye, requiring temperatures of 80°C (175°F) for immersion dyeing, or a half hour of steaming after it is applied by hand painting. There are links on the bottom of my Procion H and H-E page to instructions for using these dyes for small-scale hand dyeing. Industrial methods for using Reactive Orange 84 are nicely summarized in several graphs at the Camex company's page about their HE series dyes.

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