Russian Journal of Applied Chemistry, Vol. 77, No. 12, 2004, pp. 1997-2000. Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 12, 2004, pp. 2021-2024. Original Russian Text Copyright + 2004 by Baranov, Tsypin, Malin, Laskin. ... AB Baranov, VG Tsypin, AS Malin, and BM Laskin ... Prikladnaya Khimiya Russian Scientific Center, St. Petersburg, Russia ... Abstract-The reactions of methylhydrazine and hydrazine hydrate with chlorinated pyridazines and pyridazones ...