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Indigo dye is a dark blue crystalline powder that sublimes at 390–392 °C (734–738 °F). It is insoluble in water, alcohol, or ether, but soluble in DMSO, chloroform, nitrobenzene, and concentrated sulfuric acid. The chemical formula of indigo is C 16 H 10 N 2 O 2 .
- Indigofera - Wikipedia
Indigo dye. Several species, especially Indigofera tinctoria...
- Indigo - Wikipedia
Indigo is a term used for a number of hues in the region of...
- Indigo dye - Simple English Wikipedia, the free encyclopedia
Indigo dye is an organic molecule [1] that appears dark blue...
- Indigofera - Wikipedia
Nov 7, 2011 · Catherine McKinley traveled through nine West African countries a decade ago to track the history of indigo, the blue dye that was made very valuable by the African slave trade. Host Michel Martin ...
Dec 13, 2020 · Where the blood is blue. Finding a skilled and obliging workforce is not easy for all indigo producers. Four kilometres (2.5 miles) away from Kongrapattu, farmer Mohammed Ayub, 39, is trying to ...
Mar 22, 2024 · indigo, an important and valuable vat dyestuff, obtained until about 1900 entirely from plants of the genera Indigofera and Isatis. Indigo was known to the ancients of Asia, Egypt, Greece, Rome, Britain, and Peru. It is used in the United States mainly for dyeing cotton for work clothes; for a long time it was used to produce heavy (navy blue ...
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