Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A colorless crystalline aromatic compound, C6H3(NH2)2OH·2HCl, used as a photographic developer.
from The Century Dictionary.
- noun A trade-name for the hydrochlorid of diaminophenol, used as a developer in photography. Its formula is C6H3OH(NH2)2.2HCl. The free base is unstable.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Photog. & Chem.) A salt of a diamino phenol, C6H3(OH)(NH2)2, used as a developer.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Originally a German trademark.]
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Examples
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We needed not only the essential bulk chemicals, such as amidol, metol, para-amidophenol, and glycine, but also certain rarer substances, such as the photographic sensitisers, which were so essential for the Air Force.
The riddle of the Rhine, chemical strategy in peace and war ... 1921
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An excellent developer which must be used freshly mixed, and may be made up in a moment, is as follows: Take 1-1/2 ounces of a 25 per cent solution of sodium sulphite; dry amidol, 30 grains; 5 to 10 drops of a 10 per cent solution of potassium bromide, and dilute with 4-1/2 ounces of water.
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