PubChem says "Freely sol in water, forming sodium hydroxide and hydrogen peroxide, the latter quickly decomp into oxygen and water"
SM wiki says "The octahydrate can be easily prepared by a simple neutralization reaction with hydrogen peroxide (a weak acid) and sodium hydroxide. It
is recommended to use dilute solutions of hydrogen peroxide, because the side reaction of H2O2 decomposition becomes prevalent in concentrated
solutions. The crystals can be displaced out of solution with ethanol."
Hopefully, I'll soon know which is lying
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