Solvent Yellow 7 is an aromatic organic molecule and a common azo dye with a formula of C6H5N2C6H4OH.

[4] Like most azobenzenes, Solvent Yellow 7 can be synthesized by the reaction of the phenyldiazonium salt with phenol.

The reaction is carried out in water, since sodium chloride (or potassium chloride) formed in the reaction is soluble in water, while the product precipitates.

[5] As azo dyes are not usually water soluble, the effect of various solvents on them has been studied analytically, and likewise analytical methods and calculations for the color concentration developed.

[6][7] The molecule can be further reacted including with bromine,[8] and other halogens.