![]() | |
Names | |
---|---|
IUPAC name
trisodium; iron(3+); 5-nitroso-6-oxidonaphthalene-2-sulfonate
| |
Other names
Acid Green 1; C.I. 10020
| |
Identifiers | |
3D model (JSmol)
|
|
ChEBI | |
ECHA InfoCard | 100.039.085 |
EC Number |
|
PubChem CID
|
|
UNII | |
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
C30H15FeN3Na3O15S3 | |
Molar mass | 878.45 g·mol−1 |
Density | 1.423 g/cm3 |
Melting point | 349.84 °C |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Naphthol Green B is a coordination complex of iron that is used as a dye.[1] The ligand is a sulfonated derivative of 1-nitroso-2-naphthol.
Naphthol Green B is the sodium salt of Naphthol Green Y (C.I. 10005). The organic ligands each bind to iron as bidentate ligands through the nitrogen and the anionic phenoxide groups. Three ligands are bound to the iron.[2]
Its absorption maximum is 714 nm in water.[3] It is water-soluble.
Naphthol Green B is used in histology to stain collagen.[4] 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.[3]