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In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing. Reactive dyeing is the most important method for coloring cellulose fibers.
Reactive blue 4 61205 anthraquinone 13324-20-4: BODIPY: Dipyrrometheneboron difluoride 138026-71-8: Brazilin/Brazilein: Natural red 24 75280 natural 474-07-7: Brilliant Black BN: Food Black 1 28440 diazo 2519-30-4: Brilliant blue FCF: Erioglaucine FD&C Blue No. 1 Acid blue 9 Food blue 2 42090 triarylethlamine 3844-45-9: Brilliant cresyl blue ...
Vinyl sulfone dyes are reactive dyes comprising a vinyl sulfone group as reactive group (a fiber-bonding site of the reactive dye, "reactive hook"). Due to the relatively high reactivity of the vinyl sulfone group with water (residual moisture, air humidity), it is present in many commercial products in a protected form.
Procion is a brand of fibre reactive dyes. They are commonly used in tie dye and other textile crafts. They are dichlorotriazine dyes and were originally made by Imperial Chemical Industries. The brand name is now owned by Dystar, but, since the patent on the dyes has expired, many manufacturers around the world now make them. [1]
Examples of acid dye are Alizarine Pure Blue B, Acid red 88, etc. Basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. Usually acetic acid is added to the dye bath to help the uptake of the dye onto the fiber. Basic dyes are also used in the coloration of paper.
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One of the most important anthraquinone dyes of herbal origin is alizarin, which is extracted from the dyer's madder (Rubia tinctorum). Alizarin is the eponym for a number of structurally related dyes that use alizarin dyes (sometimes synonymous with anthraquinone dyes). It was the first natural dye for which an industrial synthesis was ...
With amines, one or more chloride is displaced. The remaining chlorides are reactive, and this theme is the basis of the large field of reactive dyes. Cyanuric chloride assists in the amidation of carboxylic acids. [3] The 1,2,4-triazines can react with electron-rich dienophiles in an inverse electron demand Diels-Alder reaction. This forms a ...