potassium dichromate

American  

noun

Chemistry.

1. an orange-red, crystalline, water-soluble, poisonous powder, K 2 Cr 2 O 7 , used chiefly in dyeing, photography, and as a laboratory reagent.

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potassium dichromate British  

noun

1. an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K 2 Cr 2 O 7

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Etymology

Origin of potassium dichromate

First recorded in 1880–85

Example Sentences

See Examples For:

potassium dichromate

It consists of a Bunsen battery that I activate not with potassium dichromate but with sodium.

From Twenty Thousand Leagues Under the Sea by Walter, F. P.

On evaporating the solution these substances crystallize out as potassium chrome alum, which substance is produced as a by-product in the industries using potassium dichromate for oxidizing purposes.

From An Elementary Study of Chemistry by McPherson, William

The principle of the process is this: An organic tacky substance is sensitized with potassium dichromate, and exposed under a reversed positive to the action of light.

From Photogravure by Blaney, Henry R.

The latter is prepared by oxidizing the anthracene—previously reduced by sublimation to the condition of a very finely-divided crystalline powder—with sulphuric acid and potassium dichromate.

From Coal and What We Get from It by Meldola, Raphael

On boiling it with copperas it becomes violet, while on boiling with potassium dichromate it changes to a yellowish brown.

From Scientific American Supplement, No. 363, December 16, 1882 by Various