What exactly is Benedict's solution? I understand that it is used for glucose, but how does it test it?

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trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

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Named for Stanley Rossiter Benedict, this chemical is used to test for the presence of sugar in a solution. It is known as a chemical indicator. It contains copper sulfate and it will react with reducing sugars to produce a color change. To test a substance for sugar, one heats the food sample which is dissolved in water. Add a small amount of Benedict's solution. Between 4 and 10 minutes a color change occurs if sugar is present. Green, yellow, orange, red and brick red indicate solutions ranging from slight sugar--green color to a brick red color for high amounts of glucose.If no sugar was present, the color would remain blue.


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