Sudan Red G

CI 12150; sudan red I; 1-(2′-methoxyphenylazo)-2-naphthol; C₁₇H₁₄N₂O₂ = 278.3

Reddish-brown powder, practically insoluble in water.

Chromatography Thin-layer chromatography (2.2.27) using silica gel G as the coating substance: apply 10 μL of a 0.1 g/L solution in methylene chloride and develop over a path of 10 cm with the same solvent; the chromatogram shows only one principal spot.