Pyrvinium chloride

A hot, filtered solution of 2.27 grams of pyrvinium chloride dihydrate in 250 ml of water is added slowly to a solution of 2.25 grams of sodium pamoate monohydrate in 50 ml of water. A red precipitate immediately forms. The mixture is heated at about 90°-100°C for 5 minutes more and then filtered. The reaction product is washed with hot water and dried at about 75°C in a vacuum. This preparation melts at about 210°-215°C with prior softening from about 190°C. 

Pyrvinium Chloride. 6- Dimethylamino)-2-[2-(2,5-dimethyt-l-phenyi-tH-pyrroi-3-yi)ethenyl]-l-methyl-quinotinium chloride viprynium chloride SN 4395. 

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