Kosher, except for Pesach
Description: Acetic acid (preservative) (acidity regulator)
Function: acidity regulator
Rationale:
Same as E253 (duplicate acetic acid entry); STAR-K flags vinegar's chametz/kitniyot alcohol source as the Passover-specific concern.
If you don't see a status above, it does not mean the additive is not kosher automatically - it might just not be documented in our database yet.