Leuco dye information

A leuco dye (from the Greek λευκό leuko: white ) is a dye which can switch between two chemical forms, one of which is colorless. Reversible transformations...

chromism. The two common approaches are based on liquid crystals and leuco dyes. Liquid crystals are used in precision applications, as their responses...

as a saturable absorber in dye lasers, or as a pH indicator between pH 0.2–1.8. However, this use is relatively rare. Leuco-malachite green (LMG) is used...

dithionite (Na2S2O4), which converts the dye to its "leuco" form that is soluble. Once attached to the fabric, the leuco dye is then oxidized to the insoluble...

Indigo dye is an organic compound with a distinctive blue color. Indigo is a natural dye extracted from the leaves of some plants of the Indigofera genus...

the leuco dyes are further chemically modified to their blocked forms. Such blocked leuco dyes are the leuco dye precursors that form the leuco dye by...

used in thermally sensitive papers: leuco dyes, developers, sensitizers and stabilizers. Leuco dyes The leuco dyes used in direct thermal paper are usually...

water-soluble alkali metal salt of the dye. This form is often colorless, in which case it is referred to as a Leuco dye, and has an affinity for the textile...

This protects the dyes and crystals from mixing with other chemicals that might affect the functionality of the ink. The leuco dye variant is typically...

spirooxazines. For example, the spiro form of an oxazine is a colorless leuco dye; the conjugated system of the oxazine and another aromatic part of the...

a common leuco dye product for thermal paper. Hatano, Y. "The chemistry of fluoran leuco dyes" in Chemistry and Applications of Leuco Dyes, Ed. R. Muthyala...

weak acid forms a colored complex with the leuco dye by causing the lactone ring in the center of the dye molecule to open. At high temperatures, above...

Crystal violet lactone (CVL) is a leuco dye, a lactone derivate of crystal violet 10B. In pure state it is a slightly yellowish crystalline powder, soluble...

applicator, such as a felt pen, uses a composition containing a colorless leuco dye that changes to color in the presence of acid. The substrate in the Color...

impregnated with a solid-state mixture of a dye and a suitable matrix, for example, a fluoran leuco dye and an octadecylphosphonic acid. When the matrix...

Oxidation of the resulting compound to give the final dye. The preparation (dye precursors) is in the leuco (colorless) form. Oxidizing agents are usually hydrogen...

employed, a standard reagent being dithionite, which traditionally affords leuco dyes. Precipitation, often coupled with flocculation, is yet another approach...

and hydrochloric acid. The dye can also be prepared by the condensation of formaldehyde and dimethylaniline to give a leuco dye: CH2O + 3 C6H5N(CH3)2 → CH(C6H4N(CH3)2)3...

Self-Defense Force. Legionella containing vacuole Leuco Crystal Violet, or Crystal Violet Leuco dye Leucocytoclastic: medical disorder Logical Column...

to give the leuco (colorless) tertiary alcohol [(H2N(CH3)C6H3)3COH, which is oxidized in acid to give the dye. New fuchsine is used to dye polyacrylonitrile...

indigo dye and blue-purple 6-bromoindigo. The leuco (white) solution form of dibromoindigo loses some bromines in the ultraviolet radiation. The dye produced...

pH-dependent redox indicator with E0 = 0.06 at pH 7.0. Its reduced form, leuco-thionine, is colorless. When both the amines are dimethylated, the product...

the nitro groups to amino groups with zinc dust in acetic acid to the leuco dye 7, which on exposure to hydrochloric acid eliminates aniline to the known...

coupling. Subsequent oxidation of the leuco intermediate gives the dye. Pinacyanol is a prototypical cyanine dye that was widely used as a sensitizer in...

the age of 43 in 2014. The colored bubble solution uses special dyes called leuco dyes. For instance, the purple bubble uses a chemical called crystal...

salt of the dye, which, in this leuco form, has an affinity for the textile fiber. Subsequent oxidation reforms the original insoluble dye. The color of...

colorless leuco-methylene blue. Shaking the flask causes oxygen present in the head space air to dissolve in the solution and oxidize the leuco-methylene...

Sodium thiosulfate is used predominantly in dyeing. It converts some dyes to their soluble colorless "leuco" forms. It is also used to bleach "wool, cotton...

develop their color, Inkodyes are developed by light. These dyes are suspended in leuco form appearing colorless until they are exposed to UV. Their...