Diethylhexyl Syringylidenemalonate
A sun filter stabilizer with antioxidant action. It holds UV filters in light and protects the formula from oxidation. Well tolerated.
Evidence by route
Topical application
A functional filter stabilizer. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Diethylhexyl Syringylidenemalonate is a synthetic antioxidant and stabilizer known by the trade name Oxynex ST. INCI: Diethylhexyl Syringylidenemalonate. In a formula it protects other components from oxidation, extends their stability, and supports the photostability of ultraviolet filters in sunscreens. It is a functional antioxidant for the formula itself rather than a skincare active for skin. It helps the product keep its properties longer. Pregnancy safety. Systemic absorption through intact skin is low and there is no evidence of harm. It can be used during pregnancy and lactation. Tolerance. Irritation and allergen potential are low, suitable for sensitive skin.
Frequently asked questions
Is Diethylhexyl Syringylidenemalonate safe during pregnancy?
Diethylhexyl Syringylidenemalonate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Diethylhexyl Syringylidenemalonate for?
Diethylhexyl Syringylidenemalonate suits: normal, dry, combination, oily, sensitive.
What is Diethylhexyl Syringylidenemalonate and what does it do in cosmetics?
A sun filter stabilizer with antioxidant action.
What's the INCI name for Diethylhexyl Syringylidenemalonate?
The INCI name is Diethylhexyl Syringylidenemalonate. It may also appear as: Oxynex ST.
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