STUDIES ON THE CHANGES OF VITAMIN A ALCOHOL AND ITS ESTERS IN VARIOUS ALCOHOLS

Abstract

Studies were made on the change of vitamin A alcohol and its esters in various alcohols at 50 and 100℃. Vitamin A esters were changed to anhydro- and retro-vitamin A, unknown substance I (Rf 0.66,λ_<max> 295mμ, positive Carr・Price reaction) and II (Rf 0.50,λ_<max> 295,310,325mμ, positive Carr・Price reaction). The last substance was found in ethanolic or metanolic solution. Change of vitamin A acetate and palmitate was almost same degree in monohydric alcohols, but the change was small in polyhydric alcohols. Vitamin A alcohol in various alcohols remained almost unchanged.