Dyes

thumb|right|Fluorescent minerals emit visible spectrum|visible light when exposed to [[ultraviolet.]] thumb|Fluorescent marine organisms right|thumb|Fluorescent clothes used in black light theatre production, [[Prague]]

Aniline (From , meaning 'indigo shrub', and -ine indicating a derived substance) is an organic compound with the formula . Consisting of a phenyl group () attached to an amino group (), aniline is the simplest aromatic amine. It is an industrially significant commodity chemical, as well as a versatile starting material for fine chemical synthesis. Its main use is in the manufacture of precursors to polyurethane, dyes, and other industrial chemicals. Like most volatile amines, it has the odor of rotten fish. It ignites readily, burning with a smoky flame characteristic of aromatic compounds. It

thumb|right|Dyes made at De Kat, ZaandamA dye is a colored substance that is soluble in some solvent; by contrast pigments are insoluble or nearly so in all solvents. Because of their solubility, dyes can chemically bind to the material they color. Dye is generally applied in an aqueous solution and may require a mordant to improve the fastness of the dye on the fiber.

thumb|Clorox brand bleach

halochromic chemical compound added in small amounts to a solution so the pH of the solution can be determined visually

Genisteae is a tribe of trees, shrubs and herbaceous plants in the subfamily Faboideae of the family Fabaceae. It includes a number of well-known plants including broom, lupine (lupin), gorse and laburnum.

Murexide (NH4C8H4N5O6, or C8H5N5O6·NH3), also called ammonium purpurate or MX, is the ammonium salt of purpuric acid. It is a purple solid that is soluble in water. The compound was once used as an indicator reagent. Aqueous solutions are yellow at low pH, reddish-purple in weakly acidic solutions, and blue-purple in alkaline solutions.

right|thumb|300px|A stained histological specimen, sandwiched between a glass [[microscope slide.]]

4-Nitroaniline, p-nitroaniline or 1-amino-4-nitrobenzene is an organic compound with the formula C6H6N2O2. A yellow solid, it is one of three isomers of nitroaniline. It is an intermediate in the production of dyes, antioxidants, pharmaceuticals, gasoline, gum inhibitors, poultry medicines, and as a corrosion inhibitor.

Xanthene (9H-xanthene, 10H-9-oxaanthracene) is the organic compound with the formula CH2[C6H4]2O. It is a yellow solid that is soluble in common organic solvents. Xanthene itself is an obscure compound, but many of its derivatives are useful dyes.

thumb|A fluorophore-labeled human cell

equipment using an organic dye to emit coherent light

surface breaking defect inspection method

thumb|right|alt=A rectangle of indigo blue and white cloth lying on a wooden table covered with a tatami mat, viewed diagonally from the corner.|A section of (spider ) dyed with indigo, next to that has not been dyed yet is a Japanese manual tie-dyeing technique, which produces a number of different patterns on fabric.

type of dyes

chromic dye that can switch between colored and colorless forms

thumb|220px|class=skin-invert-image|Paraquat is a prominent viologen. Viologens are a family of organic compounds with the formula (C5H4NR)2n+(X-)2. They are N-alkyl derivatives of bipyridines. In some viologens, the pyridyl groups are further modified.

thumb|300px|Bandhani craft

product used to improve optical whiteness of clothing or textiles

water-soluble dye that adheres to a substrate, usually a textile material or leather, without the use of a mordant

chemical compound

2-Nitrodiphenylamine is an organic chemical with the formula . It is a nitrated derivative of diphenylamine. It is a red solid, usually found in form of flakes or powder. It is polar but hydrophobic.

A masterbatch is a concentrated mixture of pigments and / or additives blended and extruded together in a carrier matrix, such as resin or wax, that is used to add these mixed additives to a final plastic product. The additives may be used for colouring (a "colour masterbatch") or for imparting other properties (an "additive masterbatch"). The typical alternative to using a masterbatch is to compound the plastic from raw undiluted additives.

method of tracking fluid flow

A dye for synthetic polymers

chemical compound

The formazans are compounds of the general formula , formally derivatives of formazan , unknown in free form.

class of chemical compounds

chemical compound

the most commonly used dyes manufactured for cotton in terms of volume