We shouldn't cook acids, alkali and concentrated salts on teflon. But what are exact numbers? Can I put a sour dairy stuff for on it example, like kefir (it's good to put it in pancakes) ? Where is safe pH range?
Acidity Teflon Kitchen Safety Acid Alkalinity – Suitable pH Range for Cooking on Teflon
acidacidityalkalinitycooking-safetyteflon
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Best Answer
This is incorrect. Teflon (PTFE) itself is one of the most non-reactive substances you can use on cookware, in some ways better than ceramic. To quote Wikipedia:
So why is there so much advice on not cooking high-acid foods in teflon pans? As far as I can tell, it's because teflon pans scratch easily, and acids can get into scratches. This has two potential effects:
Given the above, however, I think you can see that there is no specific pH that's bad for teflon pans. The lower the pH the worse the two above effects can potentially be, but a lot more depends on the manufacture of the pan, how scratched or abraded the teflon is, and even how long and how hot the food is in the pan. And if your teflon pan is brand-new and high-quality, it's one of the best vessels for making high-acid foods you have.