One would probably end up with a lot of sodium sulfate contamination when crystalising out the product. In theory adding enough hydrochloric acid
would make Hydrazine Dihydrochloride and it should be possible to crystalise it out with cooling(some websites say it's solubility is 5g/100g @idk *C,
cuz they didnt write that), though I assume the yield would suck ass |