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Aniline

Aniline is an organic compound. Aniline was first isolated by destructive distillation of indigo by Otto Unverdorben. Aniline is the prototypical aromatic amine. Its main use is in the manufacture of precursors to polyurethane. Aniline is mainly produced in industry in two steps from benzene. First, benzene is nitrated using a concentrated mixture of nitric acid and sulfuric acid at 50 to 60 °C, which gives nitrobenzene. In the second step, the nitrobenzene is hydrogenated, typically at 200–300 °C in presence of various metal catalysts. Aniline reacts with carboxylic acids or more readily with acyl chlorides such as acetyl chloride to give amides. Aniline and its ring-substituted derivatives react with nitrous acid to form diazonium salts. It reacts with nitrobenzene to produce phenazine in the Wohl-Aue reaction.

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Aniline Hydrochloride

Anilinium chloride is an aromatic ammonium salt. It can be prepared by the reaction of aniline with hydrochloric acid. Anilinium chloride is used to make dyes and printing ink.

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Anisaldehyde

Anisaldehyde is an organic compound that consists of a benzene ring substituted with an aldehyde and a methoxy group. It is used as an intermediate in the synthesis of other compounds important in pharmaceuticals and perfumery. A solution of para-anisaldehyde in acid and ethanol is frequently used to stain thin layer chromatography plates. It is a particularly useful stain because different spots on the plate can be stained different colors allowing easy distinction.

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Anisaldehyde Dimethyl Acetal

Anisaldehyde dimethyl acetal is used as flavouring agent,protecting group reagent for diols.

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Anthracene

Anthracene is a solid polycyclic aromatic hydrocarbon of formula C14H10, consisting of three fused benzene rings. It is a component of coal tar. Anthracene is used in the production of the red dye alizarin and other dyes. Anthracene is colorless but exhibits blue (400-500 nm peak) fluorescence under ultraviolet light. Anthracene is a tricyclic aromatic hydrocarbon derived from coal tar; melts at 218°C,boils at 354°C, insoluble in water but is soluble in most organic solvents such as carbon disulfide, alcohols, benzene, chloroform, and hydronaphthalenes. Anthracene is a nucleus for polymer soluble pigments. Anthracene forms reversible photodimer through the 9-, 10- positions in response to light and provides photochromic applications. Anthracene family compounds are base materials for colorings.

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Antimony Pentachloride

Antimony pentachloride is a chemical compound. It is used in analytical testing for caesium and alkaloids, for dyeing, and as an intermediate in chemical synthesis. It is also a strong oxidizing agent.

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Antimony Pentoxide

Antimony Pentoxide is a chemical compound of antimony and oxygen. It is used as a Flame retardant in ABS and other plastics,rubber a flocculant in the production of titanium dioxide.

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