Benzinga's M&A Chatter for Tuesday April 2, 2013

The following are the M&A deals, rumors and chatter circulating on Wall Street for Tuesday April 2, 2013: Merz Pharma Group Offers to Acquire Obagi Medical Products for $22/Share in Cash The Offer: In a letter to the Board of Directors of Obagi Medical Products (NASDAQ: OMPI ), Merz Pharma Group