Please let me know whether Drimarine K dyes are monofunctional or bifunctional.

Name: Mrs Tanveer

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Books about the chemistry of dyeing

John Shore's

Cellulosies Dyeing

Useful information about the chemistry of reactive dyes, and other dye types used for cotton and other plant fibers

Victor B. Ivanov's

Reactive Dyes in Biology and Medicine

Explains use of reactive dyes for staining proteins or carbohydrates

Heinrich Zollinger

Color Chemistry: Synthesis, Properties, and Applications of Organic Dyes and Pigments

Country or region: Pakistan

Message: Please let me know whether Drimarine K dyes are monofunctional or bifunctional.

Drimarene K dyes are monofunctional dyes, with one chlorodifluoropyrimidine reactive system per dye molecule. See the chart from John Shore's book Cellulosics Dyeing at the bottom right of my page about fiber reactive dyes.

Here are some examples of molecular structures of Driamarene K dyes, starting with reactive violet 33:

[image from http://www.worlddyevariety.com/reactive-dyes/reactive-violet-33.html#more-4468]

and another, reactive orange 64:

[image from http://www.worlddyevariety.com/tag/reactive-orange-e3ga]

Reactive yellow 25 is listed as a Drimarene K dye, but it lacks the fluorine atoms of the other two:

[image from http://www.worlddyevariety.com/reactive-dyes/reactive-yellow-25.html]

Each of these examples is obviously monofunctional. There's only one reactive section to the molecule, which is the end with chlorine and/or fluorine atoms; the rest of the molecule is the chromophore, which creates the color, and the connection in between the two parts.

For a drawing of the reaction between a representative Drimarene K dye and a textile fiber, see my blog post from February 21, 2006.

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Posted: Wednesday - June 13, 2012 at 10:06 AM

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Please let me know whether Drimarine K dyes are monofunctional or bifunctional.

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