Kosher all year around
Description: Succinic acid (acidity regulator)
Function: acidity regulator
Rationale:
Multiple sources (foodsweeteners.com, foodadditives.net) describe succinic acid as parve/kosher and kosher-for-Passover with no problematic sourcing, unlike the wine-derived tartrates; the prior not_kosher flag appears to be an error.
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.