What is E451ii?
Potassium tripolyphosphate (E451ii) is a phosphate salt used for specified technical functions such as stabilising, emulsifying and texture support. Goodnessly rates E451ii Safe, while food-category permissions and regulator conditions still apply.
A phosphate salt used for specified technical functions such as stabilising, emulsifying and texture support. Check the food category, amount and full formulation rather than judging one ingredient in isolation.
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Read the FAQ →
What is Potassium tripolyphosphate?
Potassium tripolyphosphate is a phosphate salt used for specified technical functions such as stabilising, emulsifying and texture support. Its function depends on the formulation and the conditions attached to the permitted use.
What's it used for?
- Supporting texture and consistency
- Helping stabilise a permitted formulation
- Serving an emulsifying or sequestrant function where allowed
- Working at permitted levels and in permitted food categories
Where you'll find E451ii on the shelf
You may see E451ii in packaged foods where its technical function is useful and the food category permits it.
Is E451ii permitted? What the regulators say
Potassium tripolyphosphate is listed or permitted in the checked AU/NZ, EU and US frameworks with conditions. Permission is conditional: category, level, identity and specifications matter.
| Region | Status | What this means |
|---|---|---|
| AU/NZ Australia & New Zealand (FSANZ) | Permitted with conditions | FSANZ lists the additive number in its food-additive materials; the permitted use, food category and conditions are set by the Food Standards Code. [FSANZ source] |
| EU European Union (EUR-Lex) | Authorised with conditions | The consolidated Union list includes the additive for specified categories and conditions. [EUR-Lex source] |
| US United States (FDA) | Permitted with conditions | 21 CFR 173.310 and 175.105 provide US pathways for potassium tripolyphosphate in specified applications, subject to the sections’ conditions. [FDA source] |
Goodnessly rates E451ii Safe within its rating system. The rating does not remove the need to consider the product category, amount or full formulation.
- EFSA’s current phosphates work covers the additive group that includes this additive; the follow-up materials reviewed for this draft describe ongoing assessment work.
- The current sources checked for this draft do not state a new numerical ADI for this specific additive; this page does not infer one.
- This path is distinct from similarly named entries; check the full additive name on the label.
This section is checked periodically rather than continuously — confirm the current primary source before relying on a regulatory detail.
Who might want to limit or avoid it
- People comparing additive functions across products
- People checking the frequency of this ingredient in their usual foods
- People who want to consider the whole formulation and serving pattern
Goodnessly rates E451ii Safe as a practical prompt to understand the ingredient, the product and the overall formulation.
How to spot it on a label
Look for:
- Potassium tripolyphosphate
- 451ii
- E451ii
- Additive class (451ii)
Ingredient labels may use the name, the number, or the additive class followed by the number.
Related additives
Frequently asked questions
What is E451ii?
E451ii is Potassium tripolyphosphate, a phosphate salt used for specified technical functions such as stabilising, emulsifying and texture support.
Is E451ii permitted?
E451ii is listed or permitted with conditions in Australia/New Zealand, the EU and the US sources checked for this draft.
What should I know about Potassium tripolyphosphate?
The current EFSA phosphates materials reviewed for this draft describe ongoing assessment work and do not state a new numerical ADI for this specific additive.
How does Goodnessly rate E451ii?
Goodnessly rates E451ii (Potassium tripolyphosphate) as Safe within its rating system.
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