Potassium dichromate paper is essentially paper that has been treated with a solution of potassium dichromate (K₂Cr₂O₇) and an acid, typically sulfuric acid (H₂SO₄). This results in a paper that changes color when exposed to oxidizing agents, making it useful for detecting their presence. The potassium dichromate itself is a bright, orange-red crystalline solid at room temperature.
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