7 Chloro 7 12 Dihydro Benzo Phenarsazin And Some of Its Derivatives

Cliff Struthers Hamilton

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2312, 0. 2146: 31. 72, 29. 35 cc. Of 0. 0445 N iodine sol. Calc. For Ci 6 H 12 O 2 NAs: As, 23. 07. Found: 22. 90, 22. 83. Loss on heating at 150. Subs. , 0. 4218, 0. 4059: wt. Lost, 0. 0215, 0. 0209. Calc. For 1 H 2 O: 5. 24. Found: 5. 09, 5. 13.
The sodium salt of -y-benzo-phenazarsinic acid was prepared in the following manner. Five g. Of 7-benzo-phenazarsinic acid was dissolved in a solution of . 1 N sodium hydroxide. The solution was filtered and concentrated to a small volume on the steam...- bath. Upon cooling, the sodium salt was deposited in needle-like crystals, pink in color. After several recrystallizations from 95% alcohol an almost colorless product was ob- tained. The yield was 5. 2 g. , or 85%. The sodium salt does not melt below 260. It is soluble in water (5%), in alcohol and acetone and is quite hygroscopic. It is insol- uble in benzene and xylene.
Analyses. Subs. , 0. 2013, 0. 2209: 18. 40, 19. 95 cc. Of 0. 0521 JV iodine sol. Calc. For Ci 6 Hu0 2 NAsNa. 4H 2 O: As, 17.

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