Mannitol Cas No: 87-78-5 is a white crystalline solid with an appearance and sweet taste like sucrose. It is a kind of hexanol, a kind of dehydrating agent, can be used as a diuretic, but also as a sweetener. Mannitol is classified as a sugar alcohol; that is, it is obtained by reduction from sugars. Other sugar alcohols include xylitol and sorbitol. Mannitol and sorbitol are isomers, the only difference is the hydroxyl group on the second carbon. ZXCHEM GROUP