Last reviewed May 2026 · 1 min read
Is Sodium Tripolyphosphate vegan?
Also known as: STPP, E451i
E-number: E451i
Vegan
Suitable for a vegan diet.
Yes — Produced synthetically from minerals.
01 · The basics
What is Sodium Tripolyphosphate?
An inorganic compound used in detergents and as a preservative for seafood.
02 · The source
Where it comes from
Produced synthetically from minerals. It is 100% vegan.
Frequently asked
FAQ
Is E451i vegan?
Yes, it is a synthetic mineral salt.
Commonly found in
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