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Amidol

Explanation

Amidol is a colorless crystalline compound with the molecular structure C₆H₃₂OH. It is a dihydrogen chloride salt and is used as a photographic developer. It was introduced as a developing agent for photographic papers in 1892. It is unusual amongst developing agents as it works most effectively in slightly acid conditions rather than the strongly alkaline conditions required for most other developers. As amidol ages it changes color to a dark red-brown. Developing dishes and equipment used to prepare amidol solutions are also frequently stained brown, a stain that is very persistent.

  • also known as Diaminophenol, 2-4-Diaminophenol hydrochloride

Printed dictionaries and other books with definitions for Amidol

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Google previewAnthony's Photographic Bulletin (1902)

Amidol is a convenient abbreviation for di-amido-phenol. Its chemical formula may be...

Google previewThe Photographic News (1893)

A Weekly Record of the Progress of Photography

Amidol is a salt of diamidophenol, and is fairly soluble in water, forming a slightly acid solution.

Google previewPhotography (1893)

Amidol is a salt of diamidophenol, and is fairly solublein water, forming a slightly acid solution.

Google previewPhoto-era Magazine (1904)

by Juan C. Abel, Thomas Harrison Cummings, Wilfred A. French, A. H. Beardsley

Amidol is an ideal developer for bromide paper, as it gives the rich blue. blacks so much desired. Rodinal is a developer of wide latitude, and is a concentrated solution of paramidophenol. It is claimed for rodinal that it is adapted to the ...

Google previewPhotographic Times (1903)

An Illustrated Monthly Magazine Devoted to the Interests of Artistic and Scientific Photography

Amidol is an excellent developer for bromide paper. It gives pure writes, delicate gieys and rich blacks. Unlike the ferrous oxalate developer, it does not require the use of a clearing bath, and, unlike hydrokinone, it has no tendency to give ...

Google previewThe Darkroom Cookbook (2016)

by Steve Anchell

Because amidol is an exceedingly ...

Google previewPractical Holography, Third Edition (2003)

by Graham Saxby

Amidol is a gray powder that stains anything it touches an indelible blueblack, so be careful with it. You can also use PBQ (1 g) if you must, but give the solution 6 hours to become stable before use, and carry out all operations in a properly ...

Google previewColor Trade Journal and Textile Chemist (1917)

Devoted to the Interests of the Manufacturers and Users of American Dyestuffs and Processors of Textile Fibers and Fabrics ...

Amidol is a diaminophenohhydrochloride, first introduced by Haufi and Andresen , both the ortho and para positions in phenol being substituted by amino groups, and .

Google previewHarper's Round Table (1899)

Amidol is an ideal developer for bromide paper, giving the blue-black color so much desired in bromide prints. Rodinal, another energetic developer, comes in solution, and is a concentrated solution of para-amidolphenol. In color it is a ...

Google previewThe Dictionary of Photography for Amateur and Professional Photographers (1902)

by Edward John Wall

Amidol (Ger., Fr., Ital., Amidol). C6H3OH(NH,)1, = 124. Synonym: Diamidophenol. The peculiar characteristic of this substance is that it will develop without ...

Google previewThe Encyclopædic Dictionary of Photography (1896)

Containing Over 2,000 References and 500 Illustrations by Walter E. Woodbury

AMIDOL. — The trade name for diamidophenol (formula, C6H8O2), molecular weight, 124). — A white crystalline powder, easily soluble in water, giving a colorless solution having an acid reaction. It was first discovered by Gauche as early as ...

Google previewA Dictionary of Chemistry (2016)

by Richard Rennie, Jonathan Law

amidol. See AMINOPHENOL. amination. A chemical reaction in which an amino group (–NH2) is introduced into a molecule. Examples of amination reaction include the reaction of halogenated hydrocarbons with ammonia (high pressure and ...

Google previewModern Dictionary Cyto And Histo Chemistry (1991)

by C.K. Shah

Amidol solution Deposits of fine black silver indicate the sites of calcium carbonate or calcium phosphate. Sections are treated with AgNO3 (0.5%), amidol (0.5%) and aqueous 1% sodium thiosulphate. Ammoniacal silver carbonate Basic ...

Google previewThe A-Z Encyclopedia of Alcohol and Drug Abuse (2002)

by Thomas Nordegren

Amidol Dimepheptanol. Amidol acetate Acetylmethadol. Amidon Methadone hydrochloride. Amidon HCI Methadone hydrochloride. Amidon, -a, -e Methadone. Amidone Colloquial term for methadone, from Amidon, one of the original names ...

Google previewThe Focal Encyclopedia of Photography (2013)

by Michael R. Peres

Amidol, C6H3(NH2)2OH*2H2O A trade name for diamidophenol, a developing agent for silver bromide gelatin emulsions that was introduced by Dr. Anderson in 1892. Amidol made negatives grayish black, with very little fog. It was favored ...

Google previewThe Condensed Chemical Dictionary (1920)

A Reference Volume for All Requiring Quick Access to a Large Amount of Essential Data Regarding Chemicals, and Other Substances Used in Manufacturing and Laboratory Work by Francis Mills Turner

Amidol. Trade name for diaminophe- nol; a photographic developer. Amidopyrine. See Pyramidon. Aminoacetanilide, Para* NH2C6H9NHOCCH8.

Google previewMacmillan Dictionary of Chemistry (1987)

by D. Brynn Hibbert, A.M. James

amidol. See AMINOPHENOLs. amidone. See METHADONE. amination. Insertion of an AMINO GROUP into a molecule to form an AMINE. amine oxides (R3NO). Bases formed by the ...

Google previewDictionary Of Chemistary

by Taniya Sachdeva

Amidol [C6H3(NH2)2OH.2HCl] It is a colourless crystalline compound ( dihydrogen chloride salt), which is used mainly as a chemical agent for developing photographs. Amines They are derivatives of ammonia, where one or more hydrogen ...

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Scrabble value of A1M3I1D2O1L1

The value of this 6-letter word is 9 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

Anagrams of AMIDOL

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