Leuco dyes form the basis of thermal printer papers and certain pH indicators. The most common example is in applying sulfur dyes and vat dyes, with indigo being a classic case. This is …

LEUCO VAT BLUE 1 is an organic compound with both amine and alcohol substituents. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions …

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 insoluble indigo dye is first made water-soluble by converting into leuco compound by reducing with sodium hydrosulphite in the presence of caustic soda at around 60–65°C (Eq. …

Indigo is insoluble in water, but soluble in polar organic solvents. Prior to the dyeing process, it has to be reduced into its leuco form (soluble in water). Currently, the dye reduction step is …

5 天之前 · Of great interest to the dye industry is the observation that the aerial oxidation of leuco-indigo restores the characteristic blue/violet color. Of further interest is the realization that …

The indoxyl free radicals bind to each other to form indigo. If an alkali is present (pH is above neutral), this takes the form of water-soluble leuco-indigo (leuco means white), also known as …

Indigo dye, which is used to color cellulose fibers, is the source of the distinctive blue hue of denim clothing. As the use of denim clothing is increasing, the majority of denim items …

2014年1月1日 · Two indoxyl radicals coupled to form leuco-indigo (43), a colorless compound. Leuco-indigo (43) is then quickly oxidized by air in indigotin (8) (Scheme 10).

ChemSpider record containing structure, synonyms, properties, vendors and database links for Leucoindigo, VIFKLIUAPGUEBV-UHFFFAOYSA-N