quinizarin
Sign in to saveAlso known as Solvent Orange 86, 1,4-Dihydroxyanthrachinon, quinizarine, 1,4-dihydroxyanthra-9,10-quinone, Chinizarin, 1,4-dihydroxyanthraquinone, 1,4-dihydroxy-9,10-anthraquinone, 1,4-Dihydroxy-9,10-anthracenedione
1,4-Dihydroxyanthraquinone, also called quinizarin or Solvent Orange 86, is an organic compound derived from anthroquinone. Quinizarin is an orange or red-brown crystalline powder. It is formally derived from anthraquinone by replacement of two hydrogen atoms by hydroxyl (OH) groups. It is one of ten dihydroxyanthraquinone isomers and occurs in small amounts (as a glycoside) in the root of the madder plant, Rubia tinctorum.
Wikidata facts
- Mass
- 240.042
Show 4 more facts
- Commons category
- Quinizarin
- chemical formula
- C₁₄H₈O₄
- canonical SMILES
- C1=CC=C2C(=C1)C(=O)C3=C(C=CC(=C3C2=O)O)O
- melting point
- 197.0
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4 sectionsContents
- Production
- Uses
- See also
- References
1,4-Dihydroxyanthraquinone, also called quinizarin or Solvent Orange 86, is an organic compound derived from anthroquinone. Quinizarin is an orange or red-brown crystalline powder. It is formally derived from anthraquinone by replacement of two hydrogen atoms by hydroxyl (OH) groups. It is one of ten dihydroxyanthraquinone isomers and occurs in small amounts (as a glycoside) in the root of the madder plant, Rubia tinctorum.
==Production== Quinizarin is produced by the reaction of phthalic anhydride and 4-chlorophenol followed by hydrolysis of the chloride: thumb|center|444px|Summary equation for one synthesis of alizarin.[sic.] It can also be prepared less efficiently from phthalic anhydride and hydroquinone.