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

The contamination was first detected more than a decade ago, and officials traced it to potassium dichromate used to prevent corrosion inside cooling towers at Los Alamos lab's power plant.

From US News

Perkin isolated a derivative called allyl-toluidine, then tried to transform it into quinine by oxidizing it in a mixture with potassium dichromate and sulfuric acid.

From Scientific American

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 Project Gutenberg

She went online and ordered potassium dichromate , a corrosive chemical than can destroy human tissue.

From Washington Post

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 Project Gutenberg