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Indoxyl

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indoxyl [in′däk·səl]
(organic chemistry)
(C8H6N)OH A yellow crystalline glycoside, used as an intermediate in the manufacture of indigo.

Indoxyl 

pale yellow crystals with an unpleasant odor; melting point, 85°C. The substance exists in two tautomeric forms:

Indoxyl is present in the urine of human beings and animals as the potassium salt of 3-indoxyl sulfuric acid (urinary indican) and in the juices of certain tropical plants (in the form of glycosides), from which it can be obtained by hydrolysis.

Indoxyl is an important intermediate product in the synthesis of indigo, a dye formed during the oxidation of indoxyl. Reduction of indoxyl yields indole.



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The colonial form and phenotypic characteristics (gram-negative, slightly curved rod, catalase and oxidase positive, and indoxyl acetate negative) of the isolates were used for presumptive identification.
trunculus where the secretion contains both brominated and nonbrominated dye precursors and because of cross coupling of different indoxyl or indoleninone chromogens leading to a mixture of a high concentration of 6-bromoindigo with indigo, indirubin and dibromoindigo (Wouters 1992, Koren 1994, Cooksey 2001).
It is the addition of oxygen by lengthy and vigorous beating of the fermenting liquid that converts the indoxyl into indigotin, which eventually becomes the insoluble blue pigment.
 
 
 
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