amidol

American  

[am-i-dawl, -dol] / ˈæm ɪˌdɔl, -ˌdɒl /

noun

Chemistry.

1. a colorless, crystalline powder, C 6 H 8 N 2 O⋅2HCl, derived from phenol, used chiefly as a photographic developer.

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Amidol British  

/ ˈæmɪdɒl /

noun

1. a grey to colourless soluble crystalline solid that is used as a photographic developer; 2,4-diaminophenol dihydrochloride. Formula: C 6 H 3 (NH 2 ) 2 (OH).2HCl

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Etymology

Origin of amidol

First recorded in 1890–95; amid- + -ol ¹

Example Sentences

An excellent developer which must be used freshly mixed, and may be made up in a moment, is as follows: Take 1½ 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 4½ ounces of water.

From Project Gutenberg

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.

From Project Gutenberg