new spectrophotometric methods have been developed for the assay of some phenols by use of two pairs of reagents , m-aminophenol and periodate ( for catechol , catecholamines , eugenol and guaiacol ) and metol and periodate ( for pyrogallol , gallic acid , propyl gallate , phloroglucinol and butylated hydroxyanisole ) .
C0031428
phenols
C0034303
pyrogallol