Martius yellow

Martius yellow
Names
	Preferred IUPAC name 2,4-Dinitronaphthalen-1-ol
	Other names 2,4-Dinitronaphthol; Martinsgelb; C.I. 10315; Acid yellow 24
Identifiers
CAS Number	605-69-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:67128 ;
ChemSpider	11309 ;
ECHA InfoCard	100.009.176
EC Number	210-093-1;
MeSH	C057508
PubChem CID	11802;
UNII	5PQ80Y1K6H ;
CompTox Dashboard (EPA)	DTXSID7060544 ;
	InChI InChI=1S/C10H6N2O5/c13-10-7-4-2-1-3-6(7)8(11(14)15)5-9(10)12(16)17/h1-5,13H Key: FFRBMBIXVSCUFS-UHFFFAOYSA-N ; InChI=1/C10H6N2O5/c13-10-7-4-2-1-3-6(7)8(11(14)15)5-9(10)12(16)17/h1-5,13H Key: FFRBMBIXVSCUFS-UHFFFAOYAH;
	SMILES C1=CC=C2C(=C1)C(=CC(=C2O)[N+](=O)[O-])[N+](=O)[O-];
Properties
Chemical formula	C10H6N2O5
Molar mass	234.167 g·mol−1
Appearance	brownish-yellow powder
	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

Martius yellow is an organic compound with the formula C₁₀H₅(OH)(NO₂)₂. It is one of several isomers of dinitro-1-naphthol. It is prepared by nitration of 1-naphthol.

The compound was reported in the 1860's and then was briefly popular for dying wool. The dye was however not light-fast.

Martius yellow stains have been used to stain erythrocytes yellow so that they contrast well with red fibrin in trichrome staining methods such as Lendrum's Picro Mallory and Slidder's Martius, Scarlet and Blue (MSB). It can be combined with other small molecular weight yellow dyes to increase stain intensity.

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.
↑ Maarten R. van Bommel and Matthijs de Keijzer (2025). "The Nitro Dyes". In Maarten R. van Bommel and Matthijs de Keijzer (ed.). Bright Colours from the Past: The History, Chemistry, Characterisation and Application of Synthetic Dyes Between 1856 and 1914. Springer, Cultural Heritage Science series. doi:10.1007/978-3-031-88664-5.

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[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] Maarten R. van Bommel and Matthijs de Keijzer (2025). "The Nitro Dyes". In Maarten R. van Bommel and Matthijs de Keijzer (ed.). Bright Colours from the Past: The History, Chemistry, Characterisation and Application of Synthetic Dyes Between 1856 and 1914. Springer, Cultural Heritage Science series. doi:10.1007/978-3-031-88664-5.