Contains two preservatives. One is Sodium Benzoate (E 211): https://www.sigmaaldrich.com/catalog/product/aldrich/w302503?lang=en
Capella's flavor specs: https://www.capellaflavors.com/pub/media/sheets/specs/1416_Specs.pdf
This is just for your information; the amount contained in any final mix is bound to be very small.