Key indicatorsSingle-crystal X-ray study T = 113 K Mean (C-C) = 0.002 Å R factor = 0.029 wR factor = 0.071 Data-to-parameter ratio = 9.8For details of how these key indicators were automatically derived from the article, see

In the title structure, C10H26N2O22+·2NO3−, the ethambutol mol­ecule exists in the cationic form, having two protonated amine groups, and is charge‐balanced by two nitrate anions. In the crystal structure, a two‐dimensional network is formed via inter­molecular O—H⋯O and N—H⋯O hydrogen bonds.

The racemization of R-(-)-2-amino-1-butanol in a reaction using Co/γ-Al 2 O 3 catalysts and catalysts modified by Mg or Ca was investigated in this paper. Complete racemization was achieved with a yield of over 83% at using the Mg modified Co/γ-Al 2 O 3 catalyst under optimized reaction conditions of 170 o C and 2.5 MPa of H 2 . The catalysts were thoroughly characterized by XRD, XPS, TPR, SEM and TEM. The addition of Mg and Ca may be advantageous for dispersing and stabilizing the active species of the Co/γ-Al 2 O 3 catalyst, protecting from sintering, significantly improving its catalytic activity and stability.

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