Abstract
The title compound, C(12)H(24)NO(10) (+)·Cl(-)·H(2)O, (I), crystallizes in the monoclinic space group P2(1) and exists as a monohydrate of a monosubstituted ammonium chloride salt, with the reducing carbohydrate portion existing exclusively as the α-pyran-ose tautomer. The glycosidic bond geometry in (I) is stabilized by an intra-molecular hydrogen bond and is close to that found in crystalline α-lactose. All heteroatoms except gluco-pyran-ose ring O4 participate in an extensive hydrogen-bonding network, which propagates in all directions in the crystal structure of (I).