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麦芽糖是由两个葡萄糖分子组成的双糖,其分子式为C_(12)H_(22)O_(11)·H_2O,分子量360.31。为白色结晶性粉末,结晶中带一分子结晶水,其结晶水在一般室温下用硫酸或五氧化二磷真空干燥不能去除,加热至100℃才失去结晶水。在20℃时麦芽糖在100份水中的溶解度为:108g,微溶于醇,不溶于醚。麦芽糖熔点108℃(分解),无水物为160～165℃。旋光度[α]_D~(20)为+137.5°～+139.5°。过去麦芽糖主要用于食品工业,在医药方面仅用于制备培养基或比色标准液,间或用作片剂辅料,用量不大,不太为人们所重视。近十几年来,国外用麦芽糖作营养输液的研究颇有进展,但国内报道很少,现将搜集的部分资料介绍如下:
Maltose is a disaccharide composed of two glucose molecules with the molecular formula of C 12 H 22 O 11 H 2 O and the molecular weight of 360.31. White crystalline powder, crystal with a molecule of crystal water, the crystal water at room temperature with sulfuric acid or phosphorus pentoxide vacuum drying can not be removed, heated to 100 ° C before losing crystal water. The maltose solubility in 100 parts of water at 20 ° C is: 108 g, slightly soluble in alcohol, insoluble in ether. Maltose melting point 108 ℃ (decomposition), anhydrous 160 ~ 165 ℃. Optical rotation [α] _D ~ (20) is + 137.5 ° ~ + 139.5 °. In the past, maltose was mainly used in the food industry. It was used in medicine only for preparation of medium or colorimetric standard, or used as a tablet adjuvant. In recent decades, foreign maltose as a nutritional infusion of quite a lot of progress, but few domestic reports, we will collect some of the information is as follows: