• Reagent for determination of amino acids and peptides.
• Color reagent for pyrroles and amines: J. Am. Chem. Soc., 86, 2441 (1964); F. Feigl, Spot Tests, vol. 2, Elsevier, Amsterdam (1954), p. 198.
• Reagent for conversion of Grignard reagents to the corresponding aldehydes via the carbinol which is cleaved by an aryldiazonium salt to give the aldehyde and the 4-(dimethylamino)azo compound: J. Org. Chem., 25, 1691 (1960); 27, 279 (1962);Org. Synth. Coll., 5, 46 (1973).