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Indigo dye is an organic compound with a distinctive blue color. Indigo is a natural dye obtained from the leaves of some plants of the Indigofera genus, in particular Indigofera tinctoria. Dye-bearing Indigofera plants were once common throughout the world. It is now produced via chemical routes. Blue colorants are rare.
The Baeyer–Drewsen indigo synthesis (1882) is an organic reaction in which indigo is prepared from 2-nitrobenzaldehyde and acetone [1] [2] The reaction was developed by von Baeyer and Viggo Drewsen in 1880 to produce the first synthetic indigo at laboratory scale. This procedure is not used at industrial scale.
True indigo is a shrub 1–2 metres (3 ft 3 in – 6 ft 7 in) high. It may be an annual, biennial, or perennial, depending on the climate in which it is grown. It has light green pinnate leaves and sheafs of pink or violet flowers. The rotenoids deguelin, dehydrodeguelin, rotenol, rotenone, tephrosin and sumatrol can be found in I. tinctoria. [3]
Indigo vats are where fermentation and settlement processes for production of indigo dyestuff were accomplished. Each vat measures approximately 14 feet square and has a stuccoed interior. The upper vat, known as the "steeper vat", was used for the fermentation of indigo plants with the liquor drawn through a small portal into the "beater vat ...
Indigofera miniata, the scarlet pea or coastal indigo, is a species of flowering plant in the family Fabaceae, native to the US states of Kansas, Oklahoma, Texas, Alabama, and Florida, and to Mexico, Guatemala, and Cuba. [2] [3] It is a prostrate perennial with stems that are about 60 cm (2 ft) long, and salmon pink flowers. [3]
Indigofera is a varied genus that has shown unique characteristics making it an interesting candidate as a potential perennial crop. [clarification needed] Specifically, there is diverse variation among species with a number of unique characteristics.
Per the new Florida law, all three-story-plus condo buildings and at least 30 years old must undergo a mandatory engineering assessment before Dec. 31, 2024. Condo associations must also shore up ...
The first archaeological finds of woad seeds date to the Neolithic period. The seeds have been found in the cave of l'Audoste, Bouches-du-Rhône, France.Impressions of seeds of Färberwaid (Isatis tinctoria L.) or German indigo, of the plant family Brassicaceae, have been found on pottery in the Iron Age settlement of Heuneburg, Germany.