2. Maltose is a carbohydrate, which is formed by the action of malt containing amylase on starch. Used as a nutrient and also used to prepare culture medium. It is also a traditional nostalgic snack in China. Description: Colorless crystal. It tastes sweet, about one-third as sweet as sucrose. Crystal water will not be lost in vacuum sulfuric acid or phosphorus pentoxide dryer at room temperature. It can reduce the ignition solution. Can be fermented by many yeasts. Maltase can hydrolyze it into two molecules α-D- glucose. Soluble in water, slightly soluble in ethanol, almost insoluble in ether. The relative density is 1.54. The melting point is 102~ 103℃.
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