Hello, the solution is tested when the formula base is
Propanediol only, but if when mixed in The formula will have problems (except the member makes the formula as
Propanediol 98% ,
Salicylic Acid 2%). The study team recommends using
Complex Salicylic Acid 4-5% which will get Active
Salicylic Acid 2% completely soluble in water. and no sediment