The present invention is tetrakis [tris (dimethylamino) phosphonium Fora alkylpiperidinyl amino] relates to the provision of the separation method of the phosphonium chloride and cleavage methods.; According to the separating method, the tetrakis [tris (dimethylamino) phosphonium Fora alkylpiperidinyl amino] phosphonium chloride, the [tris (dimethylamino) phosphonium five amino] tris [tris (dimethylamino) phosphonium Fora alkylpiperidinyl amino] phosphonium as dichloride is isolated by extracting the aqueous phase.; Further, according to the isolation method, [tris (dimethylamino) phosphonium five amino] tris [tris (dimethylamino) phosphonium Fora alkylpiperidinyl amino] by neutralizing an aqueous solution of a phosphonium dichloride, tetrakis [tris (dimethylamino) It reproduces the force Fora alkylpiperidinyl amino] phosphonium chloride to precipitate as a solid.
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