Paracetamol is an aniline derivative with a sketchy date of birth (and a very sketchy rebirth)
Paracetamol was first made in 1877…or possibly 1852. Some reports state that Cahn & Hepp or a French chemist called Charles Gerhardt first synthesized paracetamol in 1852. Acetanilide was the first aniline derivative…
Mauveine aka aniline purple
Mauveine, also known as aniline purple and Perkin’s mauve, was one of the first synthetic dyes. It was discovered serendipitously by William Henry Perkin in 1856 while he was attempting to synthesise the phytochemical quinine for the treatment of malaria. It…
Rose madder aka madder
Rose madder (also known as madder) is a red paint made from the pigment madder lake, a traditional lake pigment extracted from the common madder plant Rubia tinctorum. Madder lake contains two organic red dyes: alizarin and purpurin. As a paint, it has been described as a fugitive,…
1,3-Dihydroxyanthraquinone aka purpuroxanthin or xanthopurpurin
1,3-Dihydroxyanthraquinone, also called purpuroxanthin or xanthopurpurin, is an organic compound with formula C14H8O4 that occurs in the plant Rubia cordifolia (Indian madder). It is one of ten dihydroxyanthraquinone isomers. Its molecular structure can be viewed as being derived from anthraquinone by replacement of…
1,2,4-Trihydroxyanthraquinone aka purpurin
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.…
Rubia tinctorum aka rose madder, common madder, dyer’s madder
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 Rubiacea. Description The common madder can grow up to 1.5 m in height. The evergreen leaves are approximately 5â10 cm long and 2â3 cm…
Rubia cordifolia aka common madder or Indian madder
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. Common names of this plant include manjistha in Sanskrit, Marathi, Kannada and Bengali, majith in Hindi and Gujarati,…
Rubia peregrina aka common wild madder
Rubia peregrina, the common wild madder, is a herbaceous perennial plant species belonging to the bedstraw and coffee family Rubiaceae. Etymology The genus name Rubia derives from the Latin ruber meaning “red”, as the roots of some species (mainly Rubia tinctorum) have been used since…
Rubia
Rubia is the type genus of the Rubiaceae family of flowering plants, which also contains coffee. It contains around 80 species of perennial scrambling or climbing herbs and subshrubs native to the Old World. The genus and its best-known species are commonly known…
Conductive ink
Conductive ink is an ink that results in a printed object which conducts electricity. It is typically created by infusing graphite or other conductive materials into ink. There has been a growing interest in replacing metallic…
Electoral ink
Electoral ink, indelible ink, electoral stain or phosphoric ink is a semi-permanent ink or dye that is applied to the forefinger (usually) of voters during elections in order to prevent electoral fraud such as double voting. It is an effective method for countries where identification documents for citizens are not…
Umbelliferone
Umbelliferone, also known as 7-hydroxycoumarin, hydrangine, skimmetine, and beta-umbelliferone, is a natural product of the coumarin family. It absorbs ultraviolet light strongly at several wavelengths. There are some indications that this chemical is antimutagenic, it is used in sunscreens. Umbelliferone has been…
