Kosher all year around
Description: Metatartaric acid (emulsifier)
Function: emulsifier
Rationale:
Metatartaric acid is a tartrate-family derivative of the same fully-refined tartaric acid covered by the OU heter that clears E336/E337, so no non-kosher wine residue concern remains.
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.