85% Food Grade Phosphoric Acid Use Limits
I've been tasked to see if there's any literature on the maximum amount of phosphoric acid that can be used within a product formula. Owners want to use it as a preservatie/shelf life extender for flour and corn tortillas.
Code of Federal Regulations really only says the following:
If you just want general references rather than US-specific then this opinion from EFSA's re-evaluation of phosphoric acid and phosphates could be useful reading for you: https://efsa.onlinel....efsa.2019.5674
Similarly if you're looking for some indicative limits then the EU has a useful database of all additives authorised here, and their respective limits in the various different food/drink categories: https://webgate.ec.e...FAD&auth=SANCAS