Disodium Phosphate

What is it?

Disodium phosphate is the sodium salt derived from phosphate rock in the earth.

What does it do?

In mouthwash disodium phosphate acts as a buffering agent that helps maintain the pH or acidity of the product. When disodium phosphate is combined with fluoride and phosphoric acid to form an acidulated phosphate fluoride  solution as outlined in the FDA’s Anticaries monograph, that solution promotes remineralization and helps prevent enamel dissolution.

How is it made?

Our Stewardship Model guides us to select ingredients which have been processed in a manner that supports our philosophy of human and environmental health.

Disodium phosphate is made by combining phosphoric acid, derived from phosphate rock, with soda ash. This material is then crystallized and purified for use in our products.

What are the alternatives?

For anticaries mouthwash products, with acidulated phosphate fluoride solution, disodium phosphate and phosphoric acid are required in conjunction with Sodium Fluoride per the Anticaries Drug Products for Over-the-Counter Human Use, Final Monograph.1 Tom’s offers both fluoride and fluoride free mouthwash options.

Is this the right option for me?

Disodium Phosphate is Generally Recognized as Safe (GRAS) by the FDA to be used as a food substance for human consumption.2

Tom's of Maine recognizes that no two people are alike, and even with naturally derived ingredients, some individuals may develop an allergic reaction that is unique to them. As with any product, be sure to discontinue use if you experience discomfort or other indications that the product may not be appropriate for your individual body chemistry.

121 CFR 355.10    
221 CFR 182.1788