Naphthol green B (C.I. 10020)

Naphthol Green B is a coordination complex of iron that is used as a dye.

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.