| abstract |
The refrigerator oil according to the present invention comprises a base oil containing an oxygen-containing organic compound and a phosphorus compound represented by the following formula (1). (Wherein, in the formula (1), n represents an integer of 1 to 10, R 1 to R 8 each independently represent a hydrogen atom or an alkyl group of 1 to 20 carbon atoms, Ar represents an alkyl group having 2 to 20 carbon atoms Represents a hydrogen atom or an alkoxy group. |