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Anthraquinone, also called anthracenedione or dioxoanthracene, is an aromatic organic compound with formula C 14 H 8 O 2.Several isomers exist but these terms usually refer to 9,10-anthraquinone (IUPAC: 9,10-dioxoanthracene) wherein the keto groups are located on the central ring.
For the parent molecule 9,10-anthraquinone, see anthraquinone. Structure proposed for the pigment carmine. Anthraquinones (also known as anthraquinonoids) are a class of naturally occurring phenolic compounds based on the 9,10-anthraquinone skeleton. They are widely used industrially and occur naturally.
Anthraquinone dyes are an abundant group of dyes comprising a anthraquinone unit as 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. [ 1 ]
9,10-Dihydroxyanthracene is an organic compound with the formula C 14 H 10 O 2.It is the hydroquinone form of 9,10-anthraquinone (AQ). It formed when AQ is hydrogenated. [1] It is easily dissolved in alkaline solutions and is often called soluble anthraquinone (SAQ).
Other important examples are 1,2-benzoquinone (ortho-quinone), 1,4-naphthoquinone and 9,10-anthraquinone. The name is derived from that of quinic acid (with the suffix "-one" indicating a ketone), since it is one of the compounds obtained upon oxidation of quinic acid. [4]
1,2,4-Trihydroxyanthraquinone, commonly called purpurin, is an anthraquinone. It is a naturally occurring red/yellow dye. It is formally derived from 9,10-anthraquinone by replacement of three hydrogen atoms by hydroxyl (OH) groups. Purpurin is also called verantin, smoke Brown G, hydroxylizaric acid, and C.I. 58205.
Hydrogen peroxide is produced industrially by the anthraquinone process which involves using 2-alkyl-9,10-anthraquinones for hydrogenation. Many derivatives of anthraquinone are used but 2-ethylanthraquinone is common because of its high selectivity. The hydrogenation of the unsubstituted ring can reach 90% selectivity by using 2 ...
Dihydroxyanthraquinones have the formula C 12 H 2 (OH) 6 (CO) 2.1,2,3,5,6,7-hexahydroxy-9,10-anthraquinone occurs in nature. See also. Hydroxybenzoquinone; ...