Chemical Preservatives

Chemical preservatives are synthetic compounds specifically designed to prevent microbial growth, inhibit oxidation, or otherwise extend the shelf life of processed food products. Common examples include sodium benzoate, potassium sorbate, BHA (butylated hydroxyanisole), BHT (butylated hydroxytoluene), TBHQ (tertiary butylhydroquinone), sodium nitrite, and calcium propionate. These food additives are effective at low concentrations and are identified in the NOVA food classification system as markers of ultra-processed foods. Chemical preservatives have enabled modern food distribution by allowing products to remain stable during extended storage and transportation.

Chemical preservatives are found in soft drinks, fruit juices, margarine, cooking oils, processed meats, bacon, hot dogs, bread, tortillas, dried fruits, pickles, salad dressings, cereals, snack chips, and many shelf-stable convenience foods.

Level (high → low)Level (low → high)Name (A–Z)Name (Z–A)

AllL1L2L3L4

Santa Barbara, Mango Salsa with Peach, Medium

8.12.0/10

Shoprite, Scrunchy, Toasted Oats Sweetened Oat Cereal, Apple Cinnamon

8.15.5/10

Italian Reduced Fat Dressing

8.12.0/10

Apple Cinnamon Sweetened Toasted Oat Cereal, Apple Cinnamon

8.15.5/10

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Andy Capp's Bbq Flavored Fries, 3 Oz, 3 Oz

8.13.5/10

Garden Herb Vinaigrette Dressing with an Avocado Oil Blend

8.10.0/10

Wish-Bone, E.v.o.o. Dressing, Sundried Tomato, Sundried Tomato

8.11.5/10

Classic Buttermilk Ranch Dressing, Classic Buttermilk Ranch

8.12.5/10

Italian Vinaigrette with Parmesan Dressing, Italian Vinaigrette with Parmesan

8.11.5/10

Garlic Basil Vinaigrette Dressing with an Extra Virgin Olive Oil Blend, Garlic Basil Vinaigrette

8.10.5/10

Green Sriracha Hot Sauce, Green Sriracha

8.11.0/10

Chunky Blue Cheese Dressing, Chunky Blue Cheese

Schnucks

8.11.0/10

Strawberry Banana Energy Gel, Strawberry Banana

8.12.5/10

Double Raisin Cinnamon English Muffins, Double Raisin Cinnamon

Franz

8.17.0/10

Ranch Fries Flavored Corn & Potato Snacks, Ranch Fries

Andy Capps

8.13.0/10

Harris Teeter, Fresh Foods Market, Kosher Dill Spears

5.53.0/10

Buddig, Original Pastrami

5.53.5/10

Hot Chili Sauce with Garlic Sriracha, Hot

5.50.0/10

Queen Olives with Minced Pimiento

5.50.0/10

Embasa, Salsa Verde

5.54.5/10

Hummus Singles

5.56.0/10

Black Bear, Sweet Italian Style Salami Sopressata

5.53.5/10

Lowes Foods, Manzanilla Stuffed Spanish Olives

5.53.0/10

Spur Tree, Jamaican, Crushed Scotch Bonnet Pepper Sauce

5.53.0/10

Queen Thrown Spanish Olives

5.50.0/10

Kunzler, 8 Beef Franks

5.53.5/10

Tuong Ot Sriracha, Sriracha Chili Sauce

5.51.0/10

Manzanilla Olives with Pimiento

5.51.5/10

Queen Size Spanish Olives

5.51.5/10

Mild Cheddar Shredded Reduced Fat Cheddar Cheese, Mild Cheddar

Kraft

5.33.5/10

Dried Plums

3.05.5/10

Sargento, Natural Mozzarella Cheese

3.04.0/10

Sunsweet, Pitted Prunes Dried Plums, Orange Essence

3.05.5/10

Nellie & Joe's, Key West Lime Juice, Lime

3.04.5/10

Diamond, Chopped Hazelnuts

3.08.5/10

Private Selection, Wild Alaskan Sockeye Salmon

3.00.0/10

Amazin Prunes Pitted

3.05.5/10

Nice!, Pitted Dried Plums

3.05.5/10

Sargento, Deli Style Sliced Baby Swiss Cheese

3.05.0/10

Honeycrisp Blend Cider Juice

3.00.0/10

Cvs Health, Aloe Vera Juice

3.05.0/10

Daily Chef, Dried Mediterranean Apricots

3.05.5/10

Labneh Middle Eastern Style Spreadable Cheese

3.04.5/10

Tikras Tbopot Cottage Cheese

3.07.0/10

Prakling Pink Catawba From Concentrate

3.04.0/10

Shredded Blend of Mild Cheddar and Monterey Jack Cheese, Cheddar Jack

2.03.5/10

Plain Lowfat Yogurt, Plain

Food Club

2.07.0/10

Swiss Fancy Shredded Cheese, Swiss

Best Choice

2.05.0/10

Mild Cheddar Fancy Shredded Cheese, Mild Cheddar

Best Choice

2.03.5/10

Smoked Gouda Cheese Shreds, Smoked Gouda

Private Selection

2.05.0/10

Low-Moisture Whole-Milk Mozzarella Cheese

2.03.5/10

Feta Cheese

Saladena

2.05.0/10

Low-Moisture Whole-Milk Mozzarella Cheese

Borden

2.03.5/10

Triple Pepper Jack Monterey Jack Shredded Cheese with Jalapeno, Habanero and Ghost Peppers, Triple Pepper Jack

Best Choice

2.00.0/10

Triple Pepper Jack Monterey Jack Cheese with Jalapeno, Habanero and Ghost Peppers Shredded Cheese, Triple Pepper Jack

Best Choice

2.03.5/10

Feta Crumbled Cheese, Feta

Nikos

2.00.0/10

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Chemical Preservatives can appear in ingredient lists under several names. If you see any of the following, this is the ingredient family you are looking at:

Chemical preservatives provide targeted antimicrobial and antioxidant protection that extends product shelf life. Sodium benzoate and potassium sorbate inhibit mold, yeast, and bacterial growth in acidic foods. BHA, BHT, and TBHQ prevent fats and oils from becoming rancid through oxidation. Sodium nitrite inhibits the growth of Clostridium botulinum in cured meats while also contributing to their characteristic pink color and cured flavor. Calcium propionate inhibits mold growth in bread and baked goods. Each preservative is effective within specific pH ranges and food matrices.

Chemical preservatives are manufactured through industrial chemical synthesis. Sodium benzoate is produced by neutralizing benzoic acid with sodium hydroxide. Potassium sorbate is the potassium salt of sorbic acid produced through chemical condensation. BHA and BHT are synthesized from petrochemical precursors through chemical reactions. TBHQ is a derivative of hydroquinone produced through chemical synthesis. Sodium nitrite is produced through industrial chemical processes. Calcium propionate is the calcium salt of propionic acid.

Chemical preservatives are regulated as food additives with specific maximum permitted levels set by the FDA. The International Agency for Research on Cancer (IARC) has classified BHA in Group 2B (possibly carcinogenic to humans). Sodium nitrite can form nitrosamines under certain conditions, and the USDA limits sodium nitrite to 200 ppm in finished meat products. Regulatory status for specific preservatives varies internationally — some compounds permitted in the US are restricted in other countries.

This information is for educational purposes only and does not constitute medical advice.

Chemical preservatives are regulated as food additives by the FDA with specific maximum permitted levels for each compound in different food categories. They must be declared by name on ingredient labels. Several chemical preservatives that are permitted in the United States are restricted or not approved in other countries. The EU requires E-numbers for chemical preservatives and maintains specific limits that may differ from US regulations. Sulfites must be declared when present at 10 ppm or more due to sensitivity concerns.