In this site we focused on the the areas of science incluod analytical chemisty, general chemistry, inorganic chemistry, organic chemistry, physical chemistry, and spectroscopy.(Online Chemistry Dictionary )

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anion exchange

anion exchange [CHEM] A type of ion exchange in which the immobilized functional
groups on the solid resin are positive


anion [CHEM] An ion that is negatively charged

animal charcoal

animal charcoal [CHEM] Charcoal obtained by the destructive distillation of animal
matter at high temperatures; used to adsorb organic coloring matter.

animal black

animal black [CHEM] Finely divided carbon made by calcination of animal bones or
ivory; used for pigments, decolorizers, and purifying agents; varieties include bone
black and ivory black

aniline hydrochloride

aniline hydrochloride [ORG CHEM]C6H5NH2 HCl White crystals, although sometimes
the commercial variety has a greenish tinge;melting point 198 C; soluble in water and
ethanol; used in dye manufacture, dyeing, and printing

aniline black

aniline black [ORG CHEM] A black dye produced on certain textiles, such as cotton, by
oxidizing aniline or aniline hydrochloride

aniline C6H5NH2

aniline [ORG CHEM]C6H5NH2 An aromatic amine compound that is a pale brown liquid
at room temperature; used in the dye, pharmaceutical, and rubber industries


anilide [ORG CHEM] A compound that has the C6H5NH2 group; an example is benzanilide, C6H5NHCOC6H5.

anilazine C9H5Cl3N4

anilazine [ORG CHEM]C9H5Cl3N4 A tan solid with a melting point of 159–160 C; used
for fungal diseases of lawns, turf, and vegetable crops

anhydrous sodium sulfate Na2SO4

anhydrous sodium sulfate [INORG CHEM]Na2SO4 Water-soluble, white crystals with
bitter, salty taste;melts at 888 C; used in themanufacture of glass, paper, pharmaceu-
ticals, and textiles, and as an analytical reagent


anethole [ORG CHEM]C10H12O White crystals that melt at 22.5 C; very slightly soluble
in water; affected by light; odor resembles oil of anise; used in perfumes and flavors,
and as a sensitizer in color-bleaching processes in color photography

anchimeric assistance

anchimeric assistance [ORG CHEM] The participation by a neighboring group in the
rate-determining step of a reaction; most often encountered in reactions of carboca-
tion intermediates. Also known as neighboring-group participation