Fehling's solution I
Boiling point (bp) >100 °C
ADR 9 III
excl. VAT. | 1 l per Pack Qty.
Art. No. N055.1
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Fehling’s test is used to identify reducing agents, such as aldehydes and reducing sugars. Combining the two separate solutions (Fehling’s I and Fehling’s II) produces a deep-blue tartrate-copper(II) complex. Adding a reducing sample then causes a red pigment consisting mainly of copper(I) oxide to precipitate out of the mixture. This change in colour does not happen in the presence of sucrose or ketones.