Alizarin is an organic compound with formula C
14H
8O
4 that has been used throughout history as a prominent red dye, principally for dyeing textile fabrics. Historically it was derived from the roots of plants of the madder genus. In 1869, it became the first natural dye to be produced synthetically.
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.
Rose madder is the commercial name sometimes used to designate a red paint made from the pigment madder lake, a traditional lake pigment extracted from the common madder plant Rubia tinctorum.
Emodin (6-methyl-1,3,8-trihydroxyanthraquinone) is a chemical compound that can be isolated from rhubarb, buckthorn, and Japanese knotweed. It is specifically isolated from Rheum Palmatum L. It is also produced by many species of fungi, including members of the genera Aspergillus, Pyrenochaeta, and Pestalotiopsis, inter alia. The common name is derived from Rheum emodi, a taxonomic synonym of Rheum australe, and synonyms include emodol, frangula emodin, rheum emodin, 3-methyl-1,6,8-trihydroxyanthraquinone, Schuttgelb, and Persian Berry Lake.
Rubia cordifolia, often known as common madder or Indian madder, is a species of flowering plant in the coffee family, Rubiaceae. It has been cultivated for a red pigment derived from roots.
The molecular formula C14H8O5 (molar mass: 256.21 g/mol, exact mass: 256.037173) may refer to:
Purpurin or purpurine may refer to:
A trihydroxyanthraquinone or trihydroxyanthracenedione is any of several isomeric organic compounds with formula C
14H
8O
5, formally derived from anthraquinone by replacing three hydrogen atoms by hydroxyl groups. They include several historically important dyes. The isomers may differ in the parent anthraquinone isomer and/or of the three hydroxyl groups.
1,3,8-Trihydroxyanthraquinone is an organic compound. It is one of many trihydroxyanthraquinone isomers, formally derived from anthraquinone by replacement of three hydrogen atoms by hydroxyl (OH) groups.
1,3-Dihydroxyanthraquinone, also called purpuroxanthin or xanthopurpurin, is an organic compound with formula C
14H
8O
4 that occurs in the plant Rubia cordifolia. It is one of ten dihydroxyanthraquinone isomers. Its molecular structure can be viewed as being derived from anthraquinone by replacement of two hydrogen atoms (H) by hydroxyl groups (-OH).
A dihydroxyanthraquinone is any of several isomeric organic compounds with formula C
14H
8O
4, formally derived from 9,10-anthraquinone by replacing two hydrogen atoms by hydroxyl groups. Dihyroxyantraquinones have been studied since the early 1900s, and include some compounds of historical and current importance. The isomers differ in the position of the hydroxyl groups, and of the carbonyl oxygens (=O) of the underlying anthraquinone.
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 in the root of the madder plant, Rubia tinctorum.
Rubia tinctorum, the rose madder or common madder or dyer's madder, is a herbaceous perennial plant species belonging to the bedstraw and coffee family Rubiaceae.
Senna reticulata, the mangerioba grande or maria mole in Portuguese, is a pioneer tree species found on highly fertile floodplains in South America. It has some medicinal uses, but is regarded by farmers as a noxious weed, named matapasto due to its ability to grow fast and outshade neighbouring plants.
Lunatin (3-methoxy-1,6,8-trihydroxyanthraquinone) is a derivative of anthraquinone. It is produced by the Senna reticulata tree and can be extracted by soaking the bark in alcohol. Lunatin is also produced by the fungus Curvularia lunata which inhabits a marine sponge. Lunatin is an antibacterial substance.
Alizarin Red S (also known as C.I. Mordant Red 3, Alizarin Carmine, and C.I 58005. It is a water-soluble sodium salt of Alizarin sulfonic acid with a chemical formula of C
14H
7NaO
7S. Alizarin Red S was discovered by Graebe and Libermann in 1871. In the field of histology alizarin Red S is been used to stain calcium deposits in tissues, and in geology to stain and differentiate carbonate minerals.
