Synthesis of 4-Phenylazo Phenol from Anthocyanins of Delonix regia and Hibiscus sabdariffa Flowers

Anthocyanins extracted from flowers of Delonix regia and Hibiscus sabdariffa were coupled with diazotised aniline. Spectroscopic analysis revealed the resulting product to be 4-phenylazo phenol. This study provides a viable use for anthocyanins as an alternative source of phenol used in the synthesis of this dye.