Anthraquinone Dye

 Anthraquinone dyes are an abundant group of dyes comprising a anthraquinone unit because the shared structural element. Anthraquinone itself is colourless, but red to blue dyes are obtained by introducing electron donor groups such as hydroxy or amino groups in the 1-, 4-, 5- or 8-position. Anthraquinone may be a polycyclic hydrocarbon derived from anthracene or anhydride . Anthraquinone is employed within the manufacture of dyes, within the textile and pulp industries, and as a bird repellant. There are several current industrial methods to produce 9,10-Anthraquinone The Friedel-Crafts reaction of benzene and phthalic anhydride in presence of AlCl3 producing o-benzoylbenzoic acid which then undergoes cyclization, forming anthraquinone.

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