4,4 -Bis-dimethylamino-benzophenone. See Auramine

Auramine Auraminebose or Tetramethy -p,-diominoimino-benzophenone (called in Beil 4,4 -Bis-dimethyl amino-benzophenon), (CH,)jN-CsH4.C( NH)-CbH4-N(CH,)3, mw 267.36, N 15.72 %. Col Uts mp 136 insol in w sol in ale in eth. Can be prepd by treating its hydrochloride (see below) in aq ale with dil NaOH, as described in Ref 3, or by heating 4,4 -bis-dimethylamino-diphenylmethane with sulfur followed by treatment with ammonia (Retl, p 92)... 

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