Ethylhexyl Triazone is a highly effective, oil-soluble chemical sunscreen agent that provides superior protection against UVB radiation. It is renowned for its exceptional photostability and high absorption intensity, allowing for high SPF values at relatively low concentrations.
- INCI Name:
- Ethylhexyl Triazone
- Chemical/Scientific Name:
- 2,4,6-trianilino-(p-carbo-2′-ethyl-1′-hexyloxy)-1,3,5-triazine
- Common Aliases:
- Octyl Triazone, Uvinul T 150
| Category: | Sun Protection |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Personal Care, Pharmaceuticals |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| UVB Protection: | |
| Formula Stability: | |
| Irritation Risk: |
Primary Benefits:
- Provides peak absorption at 314 nm, offering robust protection against UVB-induced erythema.
- Remains structurally intact under intense UV exposure, ensuring long-lasting efficacy.
- Exhibits a high extinction coefficient, meaning small quantities effectively boost SPF ratings.
- Boasts an excellent safety profile due to its large molecular weight, which prevents skin penetration.
Potential Risks:
- May cause yellow staining on white or light-colored synthetic fabrics.
- Requires specific oil-based solvents for proper dissolution within a formula.
Biological Action & Cosmetic Profile
Chemical filters like this triazine derivative function by absorbing ultraviolet photons and converting them into harmless thermal energy. Specifically, the molecule targets the UVB spectrum (290–320 nm), which is primarily responsible for DNA damage and sunburn. Unlike older filters that may degrade when exposed to light, this substance maintains its molecular integrity, acting as a reliable shield throughout the duration of sun exposure.
Dermatological researchers highlight its high molecular weight (823 Daltons) as a significant advantage for topical application. Molecules exceeding 500 Daltons are generally incapable of penetrating the stratum corneum, the skin’s outermost layer. Consequently, this ingredient stays on the surface where it is needed, minimizing the risk of systemic absorption or localized allergic reactions. Its lack of odor and color further enhances its suitability for sophisticated cosmetic formulations.
Compatibility with other UV filters makes it a cornerstone of modern sunscreen technology. It serves as an excellent stabilizer for less stable filters like Butyl Methoxydibenzoylmethane. By preventing the photodegradation of other actives, it ensures that broad-spectrum protection (UVA + UVB) remains consistent over time.
Broader Applications & Origins
Synthetic manufacturing processes create this filter to meet the demand for high-performance, aesthetically pleasing sun care. While primarily found in daily moisturizers and beach sunscreens, its use extends to hair care products designed to prevent UV-induced protein degradation and color fading. It is currently approved for use in the European Union, Australia, and much of Asia, though it remains under review by the FDA for the United States market.
Routine Integration
Synergies:
- Butyl Methoxydibenzoylmethane: Enhances the stability of UVA protection.
- Ethylhexyl Methoxycinnamate: Works in tandem to provide comprehensive UVB coverage.
- Octocrylene: Further improves the photostability and water resistance of the final product.
- Tocopherol: Provides synergistic antioxidant protection against UV-generated free radicals.
Clinical Consensus & Safety
The Scientific Committee on Consumer Safety (SCCS) has evaluated this ingredient extensively and deemed it safe for use in cosmetic products at concentrations up to 5%. Clinical studies published in journals such as Contact Dermatitis indicate an extremely low prevalence of photoallergy or contact sensitization. Because it is non-comedogenic and does not penetrate the skin barrier, it is widely considered suitable for sensitive and acne-prone skin types.
Is Ethylhexyl Triazone safe for use during pregnancy?
Current toxicological data and the high molecular weight of the ingredient suggest it is safe, as it does not undergo systemic absorption. However, pregnant individuals should always consult their healthcare provider regarding their specific skincare routine.
Why is this ingredient not in US sunscreens?
The US FDA regulates sunscreens as over-the-counter drugs rather than cosmetics. While Ethylhexyl Triazone is widely used and approved in the EU and Asia, the FDA’s administrative process for approving “new” UV filters is significantly slower, requiring additional longitudinal data under the Sunscreen Innovation Act.
Does it leave a white cast on the skin?
No, this is a chemical filter that dissolves into the oil phase of a formula. Unlike mineral filters such as Zinc Oxide or Titanium Dioxide, it is transparent upon application and does not leave a visible residue.