Martius Yellow, 2,4-dinitro-1-naphthol

Dinitro-l-naphthol (Martius Yellow) [605-69-6] M 234.2, m 81-82°. Crystd from benzene or aqueous EtOH. 

Yellow needles from hot EtOH or CHCL. M.p, 137-5° (132°). Spar, sol. Et,0, EtOH, CgHg. Prac. insol, H5O. Non-volatile in steam. Sn -J- HCl —>- 2 4-manuno-l-naphthol. Ale. NHj at 200° —> 2 4-dinitro-l-naphthyl-amine. Na salt is the dyestuff Martius Yellow. 

Other Names Acid Yellow 24 1-Naphthol, 2,4-dinitro- l-Hydroxy-2,4-dinitronaphthalene 2,4-Dinitro-l-naphthol 2,4-Dinitronaphthol Martinsgelb Martius yellow Manchester Yellow NSC 6148... 

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