| abstract |
(57) [Summary] [Objective] To provide phenylphosphite as a stabilizer for organic materials against decomposition induced by oxidation, heat or light. ## STR1 ## The following formula I or II: (Wherein R, R 1: a hydrogen atom, an alkyl group of 1 to 4 carbon atoms or together together with the carbon atoms to which they are attached form a 3,4-dehydroepiandrosterone cyclohexylidene ring, R 2: Hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a cycloalkyl group having 5 to 6 carbon atoms, R 3 : an alkyl group having 1 to 8 carbon atoms or a cycloalkyl group having 5 to 6 carbon atoms, R 4 , R 5 and R 6 are hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 4 , R 5 and R 6 are carbon atoms of 1 to 4, R 7 , R 8 are hydrogen atoms, or together A compound represented by the formula (1), which forms an addition direct bond to. |