Isolation of Bis-5, 5'-formylfurfuryl Ether from Edible Caramel Color and Its Content

Abstract

Bis-5, 5'-formylfurfuryl ether(I)that is bis ether of 5-hydroxy methyl furfural(5-HMF)was isolated from the commercial edible caramel color. I had disagreeable afternote like 5-HMF. I was existed in all caramels tested, and the caramel of which pH was low contained higher amounts of I. Especially, the content in a ammonia-sulfite caramel(pH3.35)was as large as 0.072%.