title: 4-Hydr-oxy-2,2,6,6-tetra-methyl-piperidinium hydrogensulfate monohydrate.
abstract: In the title compound, C(9)H(20)NO(+)·HO(4)S(-)·H(2)O, the piperi-dinium ring adopts a chair conformation. Inter-molecular O-H⋯O and N-H⋯O hydrogen bonds form an extensive three-dimensional network, which consolidates the crystal structure.
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.forename: Yun-Hui
authors.initials: YH
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Cui
authors.forename: Xing-Hua
authors.initials: XH
authors.lastname: Jin
authors.forename: Wei
authors.initials: W
authors.lastname: Wang