Resorcinol, a dihydric phenol.Resorcinol is a very white crystalline solid that becomes pink on exposure to light if not completely pure.It is a key component of hair dyeing products.
Resorcinol is a 1,3-isomer (or meta-isomer) of benzenediol with the formula C₆H₆O₂ . It is used as an antiseptic and disinfectant in topical pharmaceutical products in the treatment of skin disorders and infections such as acne, seborrheic dermatitis, eczema, psoriasis, corns, calluses, and warts.