Sodium Thiosulfate
A reducing agent and antioxidant. It stabilizes the formula, supports brightening actives and limits oxidation. Well tolerated.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Sodium thiosulfate (INCI: Sodium Thiosulfate) is a reducing agent and antioxidant used for technical purposes. In cosmetics it protects the formula from oxidation and stabilizes other ingredients, especially brightening actives that are sensitive to air. This is a functional component, not a skincare active. Its work centers on formula chemistry: it keeps certain ingredients from degrading and preserves the color and performance of the product. No visible treatment effect on the skin should be expected from it. Applied topically it has no systemic relevance, so it can be used during pregnancy and breastfeeding. Tolerance is good, with low irritation potential and low allergy risk, which makes it suitable for sensitive skin. At use levels it does not dry or clog pores. Its presence in a formula usually signals that the developer took care of the stability of the more delicate actives.
Frequently asked questions
Is Sodium Thiosulfate safe during pregnancy?
Sodium Thiosulfate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Sodium Thiosulfate for?
Sodium Thiosulfate suits: normal, dry, combination, oily, sensitive.
What is Sodium Thiosulfate and what does it do in cosmetics?
A reducing agent and antioxidant.
What's the INCI name for Sodium Thiosulfate?
The INCI name is Sodium Thiosulfate.
See Sodium Thiosulfate in a product composition right on the store page
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Similar role in the formula
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