The ingredient, explained
Sodium Metaphosphate
Sodium metaphosphate
Ingredient guide
What it is and what it does
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Buffering
- Helps resist changes in a formula's pH.
- Chelating
- Binds metal ions that can affect product stability or appearance.
- Oral care
- Supports cosmetic functions in the mouth, such as cleaning or deodorising.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
We have not yet published a checked study for this exact ingredient. This is a gap in our coverage, not a finding that research does not exist or that the ingredient is ineffective.
Ingredient research is not proof that a product containing this ingredient works.
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
- INCI name on ingredient lists
- SODIUM METAPHOSPHATE
- CAS registry number
- 10361-03-2, 50813-16-6
- EC number
- 233-782-9 / 256-779-4
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026