PROCESS FOR PREPARATION OF ISOSULFAN BLUE

  • US 20120078007A1
  • Filed: 12/02/2011
  • Published: 03/29/2012
  • Est. Priority Date: 05/11/2007
  • Status: Active Grant
First Claim
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1. N-[4-[[4-(diethyl amino)phenyl] (2,5-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-ethylethanaminium, sodium salt containing 1.0% or less impurities.

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