Video tutorial on synthesizing hydrazine sulfate from household bleach using urea and gelatin in an alkaline reaction, followed by acid-base workup and crystallization. It covers reagent preparation (gelatin-urea solution), careful temperature control to prevent premature decomposition, and a decomposition step to generate hydrazine which is then converted to the sulfate salt with sulfuric acid. A post-filtration purification step forms a copper sulfate–hydrazine sulfate adduct to recover additional product. The video emphasizes safety due to hydrazine's volatility, toxicity, and carcinogenicity, and notes that yields depend strongly on reagent purity, with reported overall yields around 49% (up to ~56% with purification). Final product described as white crystals; method uses inexpensive, readily available reagents.
