... 2102 (1931). Page 3. Vol. 84 ... (45) A. I. Vogel, "A Textbook of Practical Organic Chemistry," Buli. soc. ... 4-Chloro-3-nitroazobenzene was made by the method of Borsche and Exssag; mp 87" (crystallized from ethanol). 4-Chloro-3-nitrobenzotrifluoride .-The Maumee Chemical Co. ...