I need information about reactive orange 84

Name: Hikari


Procion MX Fiber Reactive Cold Water Dye

Procion MX Dye

ideal for cotton, rayon, linen, and silk

When mixed with soda ash, Procion dyes are permanent, colorfast, and very washable. You can easily create a palette of brilliant colors ranging from light pastels to deep, vibrant hues.

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.


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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Posted: Thursday - June 25, 2009 at 10:00 PM          

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