potassium dichromate

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.

potassium dichromate

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

Word History and Origins

Origin of potassium dichromate¹

First recorded in 1880–85

Example Sentences

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

From Project Gutenberg

Potassium dichromate, 3/8 oz.; hot water, 1/2 pint; dissolve, and add all together.

From Project Gutenberg

Potassium dichromate might therefore be called potassium pyrochromate.

From Project Gutenberg

Another patent, taken out in 1879 by Heinzerling, specified the use of potassium dichromate and alum.

From Project Gutenberg

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

From Project Gutenberg