Last reviewed May 2026 · 1 min read
Is Sodium Thiosulfate vegan?
Also known as: E539, Hypo
E-number: E539
Vegan
Suitable for a vegan diet.
In short
Yes — Produced synthetically from minerals.
01 · The basics
What is Sodium Thiosulfate?
An inorganic compound used as an antioxidant and to neutralize chlorine in water.
02 · The source
Where it comes from
Produced synthetically from minerals. 100% vegan.
Frequently asked
FAQ
Is E539 vegan?
Yes, it is a mineral salt.
Commonly found in
Antidotes for cyanide poisoningAquarium water treatmentFood preservation
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