Triphenyl1 amine derivative, its manufacturing method and electrophotographic photosensitive body

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PROBLEM TO BE SOLVED : To provide : a triphenylamine derivative that improves photosensitivity in low temperature environments when used as a hole transport agent of an electrophotographic photoreceptor; a production method thereof; and an electrophotographic photoreceptor.SOLUTION : A triphenylamine derivative represented by the general formula (1) is used. (Rto Rare each independently H, a C1-4 alkyl group or a C1-4 alkoxy group, or Rand Rmay form a C3-5 alkyl ring; and Ris a C1-4 alkyl group or alkoxy group; excluding the case where Ris a methyl group, Ris H and both of Rand Rare H, and the case where Ris a methyl group, Ris H, and one of Rand Ris a methyl group at the para position and the other is H.)