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Brown 53 C.I. 48525 Solvent Brown 53 C.I.Solvent Brown 53:C.I.48525 Solvent Brown 53 ISO 9001：2015 REACH Solvent Brown 53:Transparent brown r 2,3'-Bis[[2-hydroxyphenyl)methylene]amino]-2-butenedinitrilato(2-)-N2,N3,O2,O3]nickel [2,3'-bis[[(2-hydroxyphenyl)methylene]amino]but-2-enedinitrilato(2-)-N2,N3,O2,O3]nickel