NAPHTHOL GREEN B excellent quality manufacturer, exporter and supplier. Naphthol Green B is the sodium salt of Naphthol Green Y . Its absorption maximum is 714 nm in water. It is water-soluble. Naphthol Green B is used in histology to stain collagen. Moreover, it is used for polychrome stains with animal tissue. For industry purposes Naphthol Green B is used for staining wool, nylon, paper, anoxidized aluminium and soap.