Perylene CAS NO.198-55-0
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![1-Naphthalenesulfonicacid,3,3'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(2,1-diazenediyl)]bis[4-hydroxy-,sodium salt (1:1)](http://file1.lookchem.com/300w/2010/0623/6059-34-3.jpg)
