| abstract |
A phosphite represented by the formula (I): wherein R1, R2, R4 and R5 represent hydrogen atom, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aralkyl group or a phenyl group; R3 represents hydrogen atom or an alkyl group; X represents a direct bond, sulfur atom, or a -CHR6 group in which R6 represents hydrogen atom, an alkyl group or a cycloalkyl group; A represents an alkylene group having 2 to 8 carbon atoms or a *-COR7- group in which R7 represents a direct bond or an alkylene group, and * represents the bond to the oxygen; and one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkyloxy group and the other one represents hydrogen atom or an alkyl group, and the phosphite is suitably used for an stabilizer for an organic material. |