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Naphthol Green B

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Naphthol Green B
Names
IUPAC name trisodium; iron(3+); 5-nitroso-6-oxidonaphthalene-2-sulfonate
Other names Acid Green 1; C.I. 10020
Identifiers
CAS Number
3D model (JSmol)
ChEBI
ECHA InfoCard 100.039.085 Edit this at Wikidata
EC Number
  • 243-010-2
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/3C10H7NO5S.Fe.3Na/c3*12-9-4-1-6-5-7(17(14,15)16)2-3-8(6)10(9)11-13;;;;/h3*1-5,12H,(H,14,15,16);;;;/q;;;+3;3*+1/p-6Key: JMXROTHPANUTOJ-UHFFFAOYSA-H
SMILES
  • C1=CC2=C(C=CC(=C2N=O))C=C1S(=O)(=O).C1=CC2=C(C=CC(=C2N=O))C=C1S(=O)(=O).C1=CC2=C(C=CC(=C2N=O))C=C1S(=O)(=O)....
Properties
Chemical formula C30H15FeN3Na3O15S3
Molar mass 878.45 g·mol
Density 1.423 g/cm
Melting point 349.84 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

Naphthol Green B is a coordination complex of iron that is used as a dye. The ligand is a sulfonated derivative of 1-nitroso-2-naphthol.

Structure

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.

Applications

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.

References

  1. Raue, Roderich; Corbett, John F. (2000). "Nitro and Nitroso Dyes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a17_383. ISBN 3527306730.
  2. Wang, Xiao; Zhang, Tianyong; Li, Bin; Yang, Qiusheng; Jiang, Shuang (2014). "Efficient Hydroxylation of Aromatic Compounds Catalyzed by an Iron(II) Complex with H2 O2". Applied Organometallic Chemistry. 28 (9): 666–672. doi:10.1002/aoc.3178.
  3. ^ Horobin, RW. und Kiernan, JA. (2002): Conn's Biological Stains: A Handbook of Dyes, Stains and Fluorochromes for Use in Biology and Medicine. BIOS Scientific Publ., 10th edition; ISBN 1-85996-099-5; page 101 and 102
  4. Histological and Histochemical Methods: Theory and Practice, 4th edition, J. A. Kiernan

External links

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