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

This is performed in a solution of potassium dichromate rendered alkaline with ammonia.

From Photogravure by Blaney, Henry R.

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

It will be noticed that the oxidizing action of potassium dichromate leaves potassium sulphate and chromium sulphate as the products of the reaction.

From An Elementary Study of Chemistry by McPherson, William

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

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.