Hydrochloric Acid → Hydralazine Hydrochloride

참여 물질

반응 단계

Hydralazine free base (1 part by weight) was heated in 6 to 7 parts by volume of 15% hydrochloric acid to a temperature of 70–80° C. The solution was filtered hot to remove traces of insoluble materials that were undesired by-products of the preceding step. Ethanol (6 to 7 parts by volume) was added to the filtrate. As the resulting solution cooled to ambient temperature and then further to 3–8° C., an off-white to pale yellow precipitate of the desired product, hydralazine hydrochloride, was obtained. Typical yields were 80–90%.

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