What it is
p-Anisic acid is a white crystalline aromatic acid that occurs naturally in some plants, such as anise, and is also produced synthetically. In cosmetics it is used mainly for its antimicrobial activity, often paired with other mild preservatives, and it can also act as a buffering agent. It is most effective in acidic formulations where a greater proportion of the acid is in its active, undissociated form.
Safety & warnings
Generally well tolerated at the low levels used in cosmetics. As an acid it may cause mild irritation at higher concentrations, and it is most active in low-pH formulas.
Origin & sourcing
Found naturally in anise and other botanical sources, and also manufactured synthetically for cosmetic use.
Questions everyone asks
What is p-anisic acid used for?
It is used mainly as a preservative and antimicrobial agent in cosmetics and can also help buffer the formula's pH.
Is it natural or synthetic?
It occurs naturally in plants such as anise but is also produced synthetically for cosmetic use.