Details for Congo red
Congo red
Category: Catalyst and Auxiliary
CAS NO: 573-58-0 EC NO: 209-358-4 Molecular Formula: C32H22N6Na2O6S2 Molecular Weight: 696.6632 Specification: InChI: InChI=1/C32H24N6O6S2.2Na/c33-31-25-7-3-1-5-23(25)29(45(39,40)41)17-27(31)37-35-21-13-9-19(10-14-21)20-11-15-22(16-12-20)36-38-28-18-30(46(42,43)44)24-6-2-4-8-26(24)32(28)34;;/h1-18H,33-34H2,(H,39,40,41)(H,42,43,44);;/q;2*+1/p-2/b37-35-,38-36-;; Synonyms: C.I. 22120;C.I. Direct Red 28;C.I. Direct Red 28, disodium salt;C.I. Direct Red 28, disodium salt (8CI);Congo red;Direct Red 28;Congo red (0.1% in water)[for titration];Congo red (0.1% in water);Direct Scarlet 4B;disodium 3,3'-[biphenyl-4,4'-diyldi(E)diazene-2,1-diyl]bis(4-aminonaphthalene-1-sulfonate);disodium 4-amino-3-[4-[4-[(1-amino-4-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonate;Direct Red 28; Molecular Structure: 
if you are sourcing Congo red from Germany ,just feel free to inquire
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