Acidified foods pH below 4.6. If bottled hot on a sliding scale from 185 - 200 degrees (depending on the acidity), these foods prevent the botulin toxin from growing. The more acidic, the lower the heat (required by Federal law) at which the sauce, salsa, etc. has to be bottled. For more on acidified foods, see http://www.cfsan.fda.gov -- Robert Farr (540) 668-7160 Check out http://www.thechileman.com for Hot Sauces, Salsas, Mustards & More!