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Dear Sir:
We are Jiangsu Huada Chemical Group,we manufacture 2-naphthalene sulphonic acid,alpha naphthol(CAS:90-15-3) ,sodium naphthionate ,nw acid,alpha naphthylamine,beta naphthol.2,3-Dichloro-1,4-Naphthoquinone(dichlone ) ,5-fluoroisatin(CAS: 443-69-6),7-fluoroisatin(CAS: 317-20-4),4-aminonicotinic acid methylester(CAS: 16135-36-7),Decafluorobiphenyl(CAS: 434-90-2),5-Bromonicotinamide(CAS: 28733-43-9),3-Amino-5-bromopyridine(CAS: 13535-01-8),2-Bromo-3-methylpyridine (CAS: 3430-17-9),Ethyl 3-(trif |