Quantitative determination of phenol in ointments.
A quantitative method for the assay of phenol in ointments is described. The procedure involves the formation of a blue indophenol by reacting phenol with 2,6-dibromoquinone-4-chloroimide which can be measured spectrophotometrically. The method is accurate, and interference from other active ingredients (hydrocortisone and menthol) does not occur.
D006854:Hydrocortisone; D007094:Imides; D007215:Indophenol; D008610:Menthol; D009824:Ointments / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D011809:Quinones
D007094:Imides; D009824:Ointments; D010636:Phenols; D011809:Quinones; D008610:Menthol; D007215:Indophenol; D006854:Hydrocortisone