Phosphonate salts are the result of deprotonation of phosphonic acids, which are diprotic acids: Phosphonate esters are the result of condensation of phosphonic acids with alcohols. Several methods exist for the preparation of phosphonic acids and their salts.
1 Stir in the tomato sauce, tomato paste, vinegar, diced tomatoes, and brown sugar. Season with chili powder, Italian seasoning, and salt. Bring to a boil, reduce heat to low, and simmer 1 hour.  Mix the cornstarch and water, and stir into the salsa to thicken. Transfer salsa to sterilized jars, leaving 1/2 inch headroom, and seal. Process jars in a boiling water bath 15 minutes. Store unsealed jars in the refrigerator.
1 Mix into sauce you want thickened. 2  To thicken dressings with guar gum, use only one-half teaspoon per two and a half cups of liquid. 3  Whisk or blend guar gum with oil called for in your dressing recipe before incorporating other ingredients.. Select your starch. Cornstarch is the most common to use for thickening, but you can also use potato starch, arrowroot flour, tapioca flour, or rice flour. When combined with liquids and heated, these starches swell and form a thickening gel.