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P 5 0 2 T, B. ALDRICH. dihydrochloride precipitated with dry ether. Recrystallized from absolute alcohol it forms sheaves and rosets of delicate, lemon-yellow needles which retain solvent equi.valent to one molecule of water of crystallizatioh when air-dry. The anhydrous salt shows [ol]g.' = ix8.4' in water, e = I 1.060, and gradually sinters and darkens when heated, melting to a dark red-brown liquid at 180-5 ' . alcohol, less easily in absolute alcohol or dry chloroform, and is practicallydoi:10.1021/ja01452a027 fatcat:g77a54wjibfpvf6gb4lff6y7fq