3d image of eriochrome black t skeletal formula

eriochrome black solochrome et-00 erio complexometric indicator pigment paint colorant synthetic dye dyestuffs indicator stain azo diazo titration water hardness eriochrome complex calcium magnesium metal ions edta end-point chelated molecule rare earth metals analytical chemistry azo 1-naphthol 2-naphthols nitronaphthalene naphthalenesulfonate molecular formula skeletal structural structure ball stick science scientific research organic chemical 3d