Salicylic Acid must be used cautiously because salicylic acid is in the same family as aspirin, will be absorbed into the skin, and sometimes can burn the skin! Dandruff is a scalp condition that produces a dry, flaking scaling scalp. Most people with dandruff typically treat their scalp with shampoos containing selenium sulfide, salicylic acid, or coal tars. Corticosteroids may also be applied to help limit the dandruff.INCI: Salicylic Acid PowderPurity: 99%Physical Form: White Crystalline PowderMelting Point: 130-132Ā°CApplications: TopicalUsage Rate: Up to 2% (start at a .5% or lower)Solubility: Alcohol and/or Propylene Glycols (Zemea recommended), OilCAS# 69-72-7Classification: FCC/USPOrigin: USAOdor: OdorlesspH: Acidity (pKa) 2.97