A colorless liquid used in synthetic resin manufacture, originally obtained by distilling bran.
- Glucose loses two water molecules and rearranges to form hydroxymethyl furfural, which polymerizes into brown pigments that add flavor and color to the candy.
- Johann Doebereiner,, a German chemist accidentally discovered furfural in 1832 when he treated sugar with sulfuric acid and manganese dioxide.
- Upon further heating, the sucrose forms hydroxymethyl furfural, which polymerizes into a the brown pigments that give color and flavor to the brittle.
Late 19th century: from obsolete furfurol (in the same sense) + -al.
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