Martius yellow

Martius yellow
Martius yellow
CAS number 605-69-6
PubChem 11802
Jmol-3D images Image 1
Molecular formula C10H6N2O5
Molar mass 234.17 g mol−1
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Martius yellow is a compound with formula C10H6N2O5. It is a dye.

Martius yellow stains have been used to stain erythrocytes yellow, so they contrast well with red fibrin, in trichrome 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.

Synthesis: can be obtained by sulphonating in concentrated sulfuric acid (98%) and later nitration in nitric acid of p-naphtol, but never in a mix of both acids or direct nitration, or else the aromatic ring will break.