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ETHYLHEXYL TRIAZONE.

Valuable CAS 88122-99-0 / LIGHT STABILIZER, UV ABSORBER, UV FILTER

Ethylhexyl Triazone is an advanced, oil-soluble organic UV-B filter known for its exceptional photostability and high absorption capacity. It effectively shields the skin from harmful UV-B radiation by creating an invisible protective layer.

Summary

sunscreen uv absorber uv filter

Science

Mechanism of Action

As a new-generation triazine derivative, Ethylhexyl Triazone functions by absorbing ultraviolet (UV) radiation primarily within the UV-B spectrum (280-320 nm), with peak protection observed at 314 nm. It transforms this absorbed UV energy into heat, forming a stable, non-degrading protective barrier in the upper skin layers. Its inherent photostability ensures sustained effectiveness against sunlight exposure, and it also contributes to the stability of the cosmetic formulation itself.

Research

Clinical Evidence

High confidence
Effective range 1–5%
Optimal

1-5%

Key findings

  1. 01 Studies indicate that Ethylhexyl Triazone is a highly effective UV-B absorber; even at low concentrations (1-5%), it significantly boosts a product's SPF due to its robust photostability and high absorption capacity. Its efficacy is further enhanced when synergistically combined with ingredients like zinc oxide.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Ethylhexyl Triazone exhibits very high stability even under intense UV exposure, resisting degradation and maintaining its effectiveness over time. Its polar molecular structure enhances wash-off resistance and skin affinity, making it suitable for water-resistant formulations. It presents as an odorless, colorless powder, ideal for fragrance-free products. For optimal longevity, store in tightly sealed containers, away from direct light and moisture, preferably under an inert atmosphere.

Synergies

  • Zinc oxide

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
5%
Sensitization risk Low

The European Commission's Scientific Committee on Consumer Safety (SCCS) has deemed Ethylhexyl Triazone safe for use in cosmetic products as a UV light absorber at a maximum concentration of 5%, confirming no health hazards. It has shown negative results for allergenicity, very low dermal penetration, and no evidence of genotoxicity or developmental toxicity. In the United States, while not yet approved as an active sunscreen drug ingredient by the FDA, it can be utilized in cosmetics to protect the product itself from UV degradation.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Ethylhexyl Triazone is a highly valuable, photostable UV-B filter that offers effective sun protection and formulation stability, making it an excellent choice for a wide range of UV-protective cosmetic products.

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