FIELD: medicine, pharmaceutical technology, pharmacy. SUBSTANCE: invention relates to the improved method for purification of highly effective antituberculosis preparation ethambutol. Method involves crystallization of ethambutol from lower aliphatic alcohol acidified preliminary with hydrogen chloride to the concentration 1.0-1.5 wt.-%. Method provides the enhanced yield of the end product as compared with early known methods and to retain high quality of preparation. EFFECT: improved purification method. 5 ex
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