What is Benzoic Acid?
Benzoic Acid is a preservative. A common preservative rated 2/5 for clogging and 3/5 for irritancy.
Where Benzoic Acid shows up
You'll most often find Benzoic Acid in the tail end of almost any water-containing product. Separately from clogging, its irritancy is rated 3/5 — high enough to be worth noting for sensitive skin.
Is Benzoic Acid bad for acne-prone skin?
That low score makes Benzoic Acid a reasonable choice even for acne-prone skin. As always, individual reactions vary, but it is not a likely cause of clogged pores.