salicylic acid
1,500 - 2,500 Per Kilogram
Salicylic acid (from Latin salix, "willow tree") is a lipophilic monohydroxybenzoic acid, a type of phenolic acid, and a beta hydroxy acid (BHA). This colorless crystalline organic acid is widely used in organic synthesis, and functions as a plant hormone. It is derived from the metabolism of salicin.