in water dissolving 1 g Zn(OH)2 (pptd. with KOH, neutral against phenolphthalein) in 22 ml H2O and adding 4 g Na2SO4 * 10 H2O; alkaline reaction with phenolphthalein observed;;
参考文献
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, , vol. 139, p. 857 - 857