Last reviewed May 2026 · 1 min read
Is Sodium Thiosulfate (E539) vegan?
Also known as: E539, Hypo
E-number: E539
Vegan
Suitable for a vegan diet.
In short
Yes — 100% mineral-based.
01 · The basics
What is Sodium Thiosulfate (E539)?
An inorganic compound used as an antioxidant and sequestrant.
02 · The source
Where it comes from
100% mineral-based. No animals involved.
Frequently asked
FAQ
Is E539 vegan?
Yes, it is a mineral salt.
Commonly found in
Specialty food processingWater treatment
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