Kosher, except for Pesach
Description: Caustic sulfite caramel (food colouring)
Function: food colouring
Rationale:
Same sugar-source (chametz/kitniyot) concern as plain caramel (E150a), differing only in processing method (caustic sulfite).
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.