4-Aminobiphenyl

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What Wikipedia says

4-Aminobiphenyl (4-ABP) is an organic compound with the formula C12H11N or C6H5C6H4NH2. It is an amine derivative of biphenyl. It is a colorless solid, although aged samples can appear colored. 4-Aminobiphenyl was commonly used in the past as a rubber antioxidant and an intermediate for dyes.

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