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Ingredient file // Other

Sodium Tripolyphosphate

A tartar tool with a phosphate caveat

Sodium tripolyphosphate is a manufactured phosphate salt used in kibble, often on its surface. It can slow tartar buildup when it reaches the teeth. It also adds phosphorus, so the food's total phosphorus matters for dogs with kidney disease.

Role in the food Does a job
What it is
A sodium phosphate salt used to bind calcium in saliva and hold moisture in processed food.
Made from
Phosphoric acid and soda ash or caustic soda
Main job
Slows tartar buildup
Typical amount
Trace; a 90-day dog trial tested 300 ppm
Watch for
Total phosphorus in kidney diets
Not the same as
Sodium hexametaphosphate

Straight answer

Is Sodium Tripolyphosphate safe for dogs?

Look for proof on the finished food

If sodium tripolyphosphate sits with minor additives below the main protein, starch and fat, read it as a functional ingredient. Its presence alone does not prove tartar control; look for a Veterinary Oral Health Council tartar seal. For a dog with kidney disease, get the food's total phosphorus before choosing it.

Why it is in the food
Slows tartar buildup

Our read // In our catalog

In 1 of every 12 foods we track

Share of foods that list it

8%

263 of the 3,204 foods with an ingredient list on file, from 26 brands. 160 wet dog food, 95 dry dog food, 8 dog food topper.

Each square is 1% of the catalog

Where it sits on the label

Median position 15. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

56%

Listed before the salt in 56% of foods. In the rest it is under about 1% of the recipe.

Price per lb

Foods with it $3.93
All foods $3.25

Median of the cheapest bag price across 81 priced foods, 21% above the catalog. The price is the food's, not the ingredient's.

Who leans on it

37%

of the foods that list it are from Royal Canin. 26 brands use it in total.

What it is

How it is made

The phosphate industry manufactures this salt from phosphoric acid and soda ash or caustic soda. Producers dry and heat the mixture, then size the particles for food use.4,6

  1. 01 // Source Acid and alkali Phosphoric acid is combined with soda ash or caustic soda to supply phosphorus and sodium.
  2. 02 // Process Mixed in solution The ingredients react in water to form a mixture of simpler sodium phosphates.
  3. 03 // Process Dried and heated Water is removed, then heat joins the phosphate units into tripolyphosphate.
  4. 04 // Output Food grade powder Cooled particles are sifted to size and packaged for shipment to food makers.

What is in it

Composition, dry matter

25

% phosphorus

About a quarter of the anhydrous salt is phosphorus. The amount in the finished food depends on how much the maker adds.

Phosphorus 25%4
Sodium 31%4
Phosphorus oxide equivalent 56-59%5

These figures describe anhydrous sodium tripolyphosphate, not finished kibble. Phosphorus oxide equivalent expresses the same phosphorus another way, so the rows must not be added together. A hydrated form contains more water as sold.4,5,11

Why it is in the bag

An anti-tartar additive, not a nutrient

  1. Main nutrition
  2. Supporting nutrient
  3. Does a job
  4. Mostly filler

Makers add it mainly to slow tartar. Coated on kibble, it binds calcium in saliva; in a 25-dog trial, a 300 ppm coating, or 0.03%, showed a trend toward less tartar that was not statistically certain. Lists run by weight, and it often sits well below the main protein, starch and fat, so it is likely too little to matter as nutrition. It still adds some phosphorus to the diet.2,3,9

  1. 01

    Slows tartar buildup

    On a kibble coating, it meets calcium in saliva and slows the hardening of dental plaque. The coating matters because phosphate mixed inside kibble may reach fewer teeth.1,2

  2. 02

    Holds food moisture

    Food processors also use this salt to retain water and manage texture in meat products and pet food. That is a manufacturing function, not a measured health benefit for dogs.4,11

  3. 03

    Supplied at scale

    Phosphate plants make and sell it for food and other industries as powder or solution. That ready supply gives manufacturers a consistent functional ingredient.4

How much A 90-day, 25-dog trial used the phosphate at 300 ppm, or 0.03%, in each of its experimental dry diets.2

Our read // The claims

What the evidence supports

Strong: controlled studies in dogs agree. Some: small or mixed dog data. Thin: mechanism or lab work only. None: nothing, or the evidence points the other way.

  1. Brands say

    Coated kibble reduces tartar buildup

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A 40-dog trial reported 55% less calculus with a tripolyphosphate coating. In a separate 25-dog trial, the coated group's advantage was statistically uncertain. The evidence supports a tartar benefit in some foods, not a guaranteed result from any food listing it.1,2

  2. Brands say

    Kills gum disease bacteria in the mouth

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A lab study suppressed growth of 3 Porphyromonas species at 500 to 750 mg/L. It did not measure phosphate levels in dogs' saliva after a meal or show fewer oral bacteria in dogs.7

  3. Brands say

    Prevents periodontal disease

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    The 90-day dog trial measured tartar after dental cleaning. It did not test gum inflammation, tooth loss, or long-term disease. Less tartar is a useful finding, but it does not prove periodontal disease prevention.2,8

  4. Critics say

    Any amount damages a dog's kidneys

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    An 8-dog, 18-day trial found higher postmeal phosphorus after a high-phosphorus diet containing this salt. It measured blood and urine markers, not kidney damage. An ingredient listing alone cannot show a harmful dose.3

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    It has a specific job. On the kibble surface, it binds calcium in saliva and can slow tartar formation. It supplies no protein or energy worth seeking out.1,2,4

  2. Q02

    Does the label prove dental benefits?

    No

    The ingredient list gives its name and weight order, not whether it coats the kibble or works in that recipe. A Veterinary Oral Health Council tartar seal evaluates the finished product.2,8,9

  3. Q03

    Can it replace toothbrushing?

    No

    The dog trials measured new tartar buildup. They did not show that this ingredient cleans existing deposits or treats gum disease. Daily brushing remains the standard for keeping tooth surfaces clean.1,2,8

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Royal Canin 98 / 160
  2. Cesar 32 / 45
  3. Pedigree 26 / 42
  4. Hill's 17 / 116
  5. Now Fresh 15 / 35
  6. Eukanuba 15 / 35
  7. Go! Solutions 10 / 46
  8. Iams 9 / 31
  9. Earthborn Holistic 5 / 28
  10. Health Extension 4 / 47

Foods that list it / all the brand's recipes we track.

Plus 16 more brands.

Amazon best sellers that list it

  1. #29 Royal Canin Small Adult Dry Dog Food
  2. #75 Royal Canin Small Puppy Dry Dog Food
  3. #80 Royal Canin Yorkshire Terrier Adult Dry Dog Food
  4. #100 Royal Canin French Bulldog Adult Dry Dog Food

Rank on Amazon's dog food best seller list, checked October 2026.

Usually listed with, share of the foods that list it

  1. Chicken 49%
  2. Wheat Gluten 42%
  3. Natural Flavor 40%
  4. Brewers Rice 39%
  5. Chicken Fat 32%
  6. Dried Plain Beet Pulp 31%
  7. Chicken By-Product Meal 29%
  8. Corn 25%
  9. Fish Oil 24%
  10. Chicken Liver 22%
  11. Chicken Broth 22%
  12. Carrots 22%

On the shelf

Foods that list Sodium Tripolyphosphate

263 foods in our catalog list it. These 60 list it highest on the label.

Go! Solutions Sensitivities Shredded Turkey Limited Ingredient Grain-Free Wet Dog FoodGo! SolutionsGo! Solutions Sensitivities Shredded Turkey Limited Ingredient Grain-Free Wet Dog FoodWet // No. 7 on the labelNow Fresh Good Gravy Beef Minced Grain-Free Wet Dog FoodNow FreshNow Fresh Good Gravy Beef Minced Grain-Free Wet Dog FoodWet // No. 7 on the labelPedigree Chopped Ground Dinner Adult Pouch, Chicken Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Pouch, Chicken Wet Dog FoodWet // No. 7 on the labelNow Fresh Chicken & Rice Ground with Grains Wet Dog FoodNow FreshNow Fresh Chicken & Rice Ground with Grains Wet Dog FoodWet // No. 8 on the labelDave’s Pet Food Naturally Healthy Chicken & Beef Entrée For Dogs / Wet Dog FoodDave's Pet FoodDave’s Pet Food Naturally Healthy Chicken & Beef Entrée For Dogs / Wet Dog FoodWet // No. 8 on the labelDave’s Pet Food Naturally Healthy Beef & Rice Entrée For Dogs / Wet Dog FoodDave's Pet FoodDave’s Pet Food Naturally Healthy Beef & Rice Entrée For Dogs / Wet Dog FoodWet // No. 8 on the labelOl’ Roy Meaty Loaf Chicken and Rice Dinner Can Wet Dog FoodOl' RoyOl’ Roy Meaty Loaf Chicken and Rice Dinner Can Wet Dog FoodWet // No. 8 on the labelGo! Solutions Tranquility Minced Chicken with Gravy Grain-Free Dog Food TopperGo! SolutionsGo! Solutions Tranquility Minced Chicken with Gravy Grain-Free Dog Food TopperTopper // No. 8 on the labelPedigree High Protein Chopped Ground Dinner Can, Chicken & Duck Wet Dog FoodPedigreePedigree High Protein Chopped Ground Dinner Can, Chicken & Duck Wet Dog FoodWet // No. 8 on the labelNature’s Recipe Original Adult Chicken Meal & Rice Recipe Dry Dog FoodNature's RecipeNature’s Recipe Original Adult Chicken Meal & Rice Recipe Dry Dog FoodDry // No. 8 on the labelCesar Classic Loaf in Sauce Chicken & Liver Wet Dog FoodCesarCesar Classic Loaf in Sauce Chicken & Liver Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Grilled Chicken Wet Dog FoodCesarCesar Classic Loaf in Sauce Grilled Chicken Wet Dog FoodWet // No. 9 on the label
Show 48 more
Go! Solutions Joint Care Minced Chicken with Gravy Grain-Free Dog Food TopperGo! SolutionsGo! Solutions Joint Care Minced Chicken with Gravy Grain-Free Dog Food TopperTopper // No. 8 on the labelGo! Solutions Immune Health Minced Chicken with Gravy Booster Grain-Free Dog Food TopperGo! SolutionsGo! Solutions Immune Health Minced Chicken with Gravy Booster Grain-Free Dog Food TopperTopper // No. 8 on the labelNow Fresh Chicken & Salmon Pâté Food for Senior Dogs Grain-Free Wet Dog FoodNow FreshNow Fresh Chicken & Salmon Pâté Food for Senior Dogs Grain-Free Wet Dog FoodWet // No. 8 on the labelNow Fresh All Ages Breeds Beef & Rice Ground with Grains Wet Dog FoodNow FreshNow Fresh All Ages Breeds Beef & Rice Ground with Grains Wet Dog FoodWet // No. 8 on the labelBil-Jac Sensitive Solutions Digestive & Immune Support Turkey & Pumpkin Recipe in Gravy - Bil-Jac Wet Dog FoodBil-JacBil-Jac Sensitive Solutions Digestive & Immune Support Turkey & Pumpkin Recipe in Gravy - Bil-Jac Wet Dog FoodWet // No. 9 on the labelGo! Solutions Sensitivities Duck Pâté Grain-Free Limited Ingredient Wet Dog FoodGo! SolutionsGo! Solutions Sensitivities Duck Pâté Grain-Free Limited Ingredient Wet Dog FoodWet // No. 9 on the labelNow Fresh Good Gravy Beef & Lamb Grain-Free Wet Dog FoodNow FreshNow Fresh Good Gravy Beef & Lamb Grain-Free Wet Dog FoodWet // No. 9 on the labelIams Proactive Health With Chicken AND Whole Grain Rice Classic Ground Wet Dog FoodIamsIams Proactive Health With Chicken AND Whole Grain Rice Classic Ground Wet Dog FoodWet // No. 9 on the labelHealth Extension Digestive Support, Chicken & Pumpkin Entrée in Gravy Wet Dog FoodHealth ExtensionHealth Extension Digestive Support, Chicken & Pumpkin Entrée in Gravy Wet Dog FoodWet // No. 9 on the labelPedigree High Protein Chopped Ground Dinner Can, Beef & Bison Wet Dog FoodPedigreePedigree High Protein Chopped Ground Dinner Can, Beef & Bison Wet Dog FoodWet // No. 9 on the labelPedigree Chopped Ground Dinner Adult Can, Chicken and Rice Dinner Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, Chicken and Rice Dinner Wet Dog FoodWet // No. 9 on the labelBlue Wilderness Wild Meals Chicken & Sweet Potato Wet Dog FoodBlueBlue Wilderness Wild Meals Chicken & Sweet Potato Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Turkey Wet Dog FoodCesarCesar Classic Loaf in Sauce Turkey Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Grilled Steak & Eggs Wet Dog FoodCesarCesar Classic Loaf in Sauce Grilled Steak & Eggs Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Beef Grain-Free Wet Dog FoodCesarCesar Classic Loaf in Sauce Beef Grain-Free Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Lamb Wet Dog FoodCesarCesar Classic Loaf in Sauce Lamb Wet Dog FoodWet // No. 9 on the labelCesar Classic Loaf in Sauce Duck Grain-Free Wet Dog FoodCesarCesar Classic Loaf in Sauce Duck Grain-Free Wet Dog FoodWet // No. 9 on the labelNature’s Recipe Original Adult Lamb Meal & Rice Recipe Dry Dog FoodNature's RecipeNature’s Recipe Original Adult Lamb Meal & Rice Recipe Dry Dog FoodDry // No. 9 on the labelEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodWet // No. 10 on the labelEukanuba Adult Chicken & Vegetable Stew Wet Dog FoodEukanubaEukanuba Adult Chicken & Vegetable Stew Wet Dog FoodWet // No. 10 on the labelGo! Solutions Tranquility Chicken, Salmon + Duck Stew Grain-Free Dog Food TopperGo! SolutionsGo! Solutions Tranquility Chicken, Salmon + Duck Stew Grain-Free Dog Food TopperTopper // No. 10 on the labelNow Fresh Good Gravy Cage Free Chicken Recipe Wet Dog FoodNow FreshNow Fresh Good Gravy Cage Free Chicken Recipe Wet Dog FoodWet // No. 10 on the labelNow Fresh Good Gravy Chicken with Grains Wet Dog FoodNow FreshNow Fresh Good Gravy Chicken with Grains Wet Dog FoodWet // No. 10 on the labelPedigree Weight Management Chopped Ground Dinner Adult, Chicken & Rice Dinner Wet Dog FoodPedigreePedigree Weight Management Chopped Ground Dinner Adult, Chicken & Rice Dinner Wet Dog FoodWet // No. 10 on the labelPedigree High Protein Adult Can, Chicken & Turkey Wet Dog FoodPedigreePedigree High Protein Adult Can, Chicken & Turkey Wet Dog FoodWet // No. 10 on the labelPedigree Puppy Pouch, Beef Wet Dog FoodPedigreePedigree Puppy Pouch, Beef Wet Dog FoodWet // No. 10 on the labelPedigree Chopped Ground Dinner Adult Can, Chicken, Liver & Beef Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, Chicken, Liver & Beef Wet Dog FoodWet // No. 10 on the labelPedigree Chopped Ground Dinner Adult Can, Turkey & Bacon Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, Turkey & Bacon Wet Dog FoodWet // No. 10 on the labelBlue Wild Meals High Protein Turkey Chicken Sweet Potato Feast Wet Dog FoodBlueBlue Wild Meals High Protein Turkey Chicken Sweet Potato Feast Wet Dog FoodWet // No. 10 on the labelMerrick Backcountry Grain Free Real Beef Wet Dog FoodMerrickMerrick Backcountry Grain Free Real Beef Wet Dog FoodWet // No. 10 on the labelCesar Classic Loaf in Sauce Top Sirloin Wet Dog FoodCesarCesar Classic Loaf in Sauce Top Sirloin Wet Dog FoodWet // No. 10 on the labelCesar Classic Loaf in Sauce Filet Mignon Wet Dog FoodCesarCesar Classic Loaf in Sauce Filet Mignon Wet Dog FoodWet // No. 10 on the labelCesar Classic Loaf in Sauce Porterhouse Steak Wet Dog FoodCesarCesar Classic Loaf in Sauce Porterhouse Steak Wet Dog FoodWet // No. 10 on the labelCesar Classic Loaf in Sauce Chicken & Veal Wet Dog FoodCesarCesar Classic Loaf in Sauce Chicken & Veal Wet Dog FoodWet // No. 10 on the labelWellness Core Protein Bowls Lamb, Red Rice & Peas Wet Dog FoodWellnessWellness Core Protein Bowls Lamb, Red Rice & Peas Wet Dog FoodWet // No. 11 on the labelEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodWet // No. 11 on the labelGo! Solutions Digestive Health Chicken + Lamb Stew Dog Food TopperGo! SolutionsGo! Solutions Digestive Health Chicken + Lamb Stew Dog Food TopperTopper // No. 11 on the labelNow Fresh Good Gravy Chicken & Salmon Minced Grain-Free Wet Dog FoodNow FreshNow Fresh Good Gravy Chicken & Salmon Minced Grain-Free Wet Dog FoodWet // No. 11 on the labelIams Proactive Health With Lamb AND Rice Classic Ground Dog Food TopperIamsIams Proactive Health With Lamb AND Rice Classic Ground Dog Food TopperTopper // No. 11 on the labelHealth Extension food Lamb Entrée Wet Dog FoodHealth ExtensionHealth Extension food Lamb Entrée Wet Dog FoodWet // No. 11 on the labelPedigree Chopped Ground Dinner Adult Can, Beef, Bacon & Cheese Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, Beef, Bacon & Cheese Wet Dog FoodWet // No. 11 on the labelPedigree Chopped Ground Dinner Adult Can, Filet Mignon Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, Filet Mignon Wet Dog FoodWet // No. 11 on the labelPedigree Puppy Pouch, Turkey Wet Dog FoodPedigreePedigree Puppy Pouch, Turkey Wet Dog FoodWet // No. 11 on the labelPedigree Chopped Ground Dinner Adult Can, T-bone Steak Wet Dog FoodPedigreePedigree Chopped Ground Dinner Adult Can, T-bone Steak Wet Dog FoodWet // No. 11 on the labelPedigree Choice Cuts IN Gravy Adult Can, Beef Wet Dog FoodPedigreePedigree Choice Cuts IN Gravy Adult Can, Beef Wet Dog FoodWet // No. 11 on the labelCesar Loaf & Topper in Sauce Ham & Egg with Potato & Cheese Wet Dog FoodCesarCesar Loaf & Topper in Sauce Ham & Egg with Potato & Cheese Wet Dog FoodWet // No. 11 on the labelCesar Classic Loaf in Sauce Smoked Bacon & Egg Wet Dog FoodCesarCesar Classic Loaf in Sauce Smoked Bacon & Egg Wet Dog FoodWet // No. 11 on the labelRoyal Canin Veterinary Selected Protein KO Dry Dog FoodRoyal CaninRoyal Canin Veterinary Selected Protein KO Dry Dog FoodDry // No. 11 on the label

Sources

What we read

Checked October 1, 2026.

  1. 1 Effect of Pellet Food Size and Polyphosphates in Preventing Calculus Accumulation in Dogs Journal of Veterinary Dentistry, 2007 // Journal
  2. 2 Sodium tripolyphosphate and sodium hexametaphosphate in preventing dental calculus accumulation in dogs Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2008 // Journal
  3. 3 The Source Matters-Effects of High Phosphate Intake from Eight Different Sources in Dogs Animals, 2021 // Journal
  4. 4 Certain Sodium and Potassium Phosphate Salts from China U.S. International Trade Commission, 2009 // Government
  5. 5 Evaluation of certain food additives: ninety-sixth report of the Joint FAO/WHO Expert Committee on Food Additives World Health Organization, 2023 // Regulator
  6. 6 Sodium tripolyphosphate Australian Drinking Water Guidelines, National Health and Medical Research Council, 2005 // Government
  7. 7 Antibacterial effects of sodium tripolyphosphate against Porphyromonas species associated with periodontitis of companion animals Journal of Veterinary Science, 2019 // Journal
  8. 8 Veterinary Oral Health Council Veterinary Oral Health Council, n.d. // Nonprofit
  9. 9 What's in the Ingredients List? AAFCO, n.d. // Regulator
  10. 10 Treatment Recommendations for Dogs with CKD International Renal Interest Society, 2023 // Nonprofit
  11. 11 Pentasodium Triphosphate Joint FAO/WHO Expert Committee on Food Additives, 2000 // Regulator
An ingredient on its own tells you very little. What matters is how much of it there is and where it sits in the list. That is why we weigh the top five rather than reacting to any single name further down. Back to the wiki

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