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Sodium Thiosulfate

Also known as: E539

Low concern

Sodium thiosulfate is a JECFA-evaluated additive with established safety at low levels. It is delisted from the EU food additive list (no longer authorized for general food uses since 2008).

Found in

38 products

E-number

E539

Type

antioxidant, sequestrant

What it is

Sodium thiosulfate (E539), an inorganic salt used as an antioxidant and sequestrant.

Antioxidant and sequestrant; iodised table salt stabilizer.

Why it's flagged

Limited authorized uses; not a general-purpose additive

What regulators actually say

"Sodium thiosulfate - listed in the FDA Food Additive Status List with permitted uses."

FDA Food Additive Status List — fda.gov

Regulatory status

United States — FDA

Permitted in wine and salt iodization (21 CFR 184.1)

European Union — EFSA

Not currently in EU positive list as food additive

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