Naphthol Green B

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	19381-50-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:87073 ;
ECHA InfoCard	100.039.085
EC Number	243-010-2;
PubChem CID	6915910;
UNII	W60I5H3VMQ ;
CompTox Dashboard (EPA)	DTXSID4044406 ;
	InChI InChI=1S/3C10H7NO5S.Fe.3Na/c312-9-4-1-6-5-7(17(14,15)16)2-3-8(6)10(9)11-13;;;;/h31-5,12H,(H,14,15,16);;;;/q;;;+3;3*+1/p-6 Key: JMXROTHPANUTOJ-UHFFFAOYSA-H;
	SMILES C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Fe+3];
Properties
Chemical formula	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). verify (what is ?) Infobox references

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.

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.^[2]

Applications

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]

References

^ 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.
^ 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.
^ ^a ^b 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
^ Histological and Histochemical Methods: Theory and Practice, 4th edition, J. A. Kiernan

External links

Naphthol Green B at StainsFile

[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.

[Conns-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

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