Ingredient · Organic UV Filter
Octinoxate (Organic UV Filter)
INCI · Ethylhexyl Methoxycinnamate
Related names and forms: Octinoxate · Octyl Methoxycinnamate · OMC. This list does not indicate synonyms or exact ingredient matches.
Octinoxate (INCI: Ethylhexyl Methoxycinnamate) was the world's most widely used UVB filter for many years. Its light, oil-soluble texture makes it practical for daily sunscreens and makeup-SPF combinations. Labels show 'Ethylhexyl Methoxycinnamate'. Alongside its practical benefits are two important limitations: exposed to light alone, it may partly degrade and lose protective strength, and it is known to destabilise avobenzone. Without additional stabilisation, an avobenzone-octinoxate pairing may therefore lose UVA protection faster than expected. Octinoxate is among the filters periodically subject to regulatory and environmental evaluations. These discussions should distinguish laboratory or high-dose conditions from actual cosmetic use doses, without alarmist language. In some markets, formulation choices are shifting towards newer-generation filters. Klaris considers photostabilisation support, any pairing with avobenzone and complementary UVA filters for a broad spectrum as a whole.
i. Cosmetic Functions
Frequently Discussed Effects
The following headings summarise areas of effect frequently discussed in the literature; visible results in each area require regular use and a suitable formula.
UVB Absorption
An organic filter particularly effective in UVB, often part of the foundation of daily SPF formulas.
Light Cosmetic Texture
Oil-soluble and lightweight, making it a choice for daily formulas and wear under makeup.
Combination Context
Assessed alongside UVA filters such as avobenzone and Tinosorb for broad-spectrum protection.
Mechanism
What Happens Within the Skin?
The following points summarise mechanisms from dermocosmetic literature in plain English. Klaris presents them as background information to help readers understand the context, not as medical claims.
Step 1
UVB Absorption
Absorbs UVB energy through its cinnamate chromophore. Its UVA effect is limited, so broad-spectrum coverage requires complementary filters.
Step 2
Vulnerability in Photostability
Isomerisation under light (cis/trans conversion) can reduce protection over time, making stabilisation important.
Step 3
Incompatibility With Avobenzone
A classic ingredient that can accelerate avobenzone's degradation in light; using the pair together requires additional stabilisation.
Step 4
Oil Solubility and Texture
Dissolves in the oil phase and gives a light finish, the practical reason for its use in daily products and under makeup.
Step 5
Stabilising Partnerships
Ingredients such as octocrylene or newer-generation filters can support the light resistance of systems containing octinoxate.
ii. Role in the Formula
How Is It Read on a Label?
Octinoxate is a classic UVB filter regulated by cosmetic legislation. Its stability can decrease when exposed to light alone, so it is formulated with photostable filters and stabilisers. Conditions of use are assessed within formula and market regulations.
A Closer Look · pH, Stability, Synergy
Octinoxate formed a foundation of daily SPF and makeup-SPF formulas for decades because of its light texture and low cost. Photostability is the critical issue: partial isomerisation under UV can reduce its protective strength. More importantly, pairing it with avobenzone may accelerate avobenzone degradation. Well-designed formulas therefore either avoid the pairing or support the system with stabilisers such as octocrylene or Tinosorb. Octinoxate is a UVB filter; a broad spectrum always requires a complementary UVA filter such as avobenzone, Uvinul A Plus or Tinosorb. In recent years, some markets have shifted towards more photostable newer-generation filters. This does not mean octinoxate is 'unusable', but that formulation trends are changing. Environmental and regulatory evaluations periodically come up; Klaris considers them with restraint based on public assessment processes, distinguishing laboratory conditions from actual use doses. Individual sensitivity to organic filters may be reported in sensitive profiles; patch testing a new sunscreen is a measured approach. Klaris assesses avobenzone pairing, the stabiliser combination and complementary UVA coverage as a whole.
Typical Concentration Range
2% - 10% (within conditions set by regulations)
Ingredient Family
UV Filters
iii. Sensitivity Advisory
A Note on Extra Care in Context
Individual sensitivity to organic filters may be reported in sensitive profiles. Discussing choices during pregnancy and breastfeeding with your doctor may help; mineral filters often come up as an option during these periods.
A sensitivity advisory is not an instruction for use; where individual health circumstances, pregnancy or known sensitivities are involved, discussing the decision with your doctor may be a more contextual approach.
Common Misconceptions
Frequently Confused Points
Common Belief
Octinoxate and avobenzone are always a good pairing.
A More Contextual Reading
Octinoxate can accelerate avobenzone's degradation in light. Without additional stabilisation, this pairing may lose UVA protection faster than expected.
Common Belief
Because it is the most widely used UVB filter, it is the best.
A More Contextual Reading
Prevalence does not mean superiority. Newer-generation filters are more photostable in some respects. 'Best' depends on the whole formula and balance of protection.
Common Belief
As a chemical filter, it harms health and the environment.
A More Contextual Reading
Regulatory and environmental evaluations of octinoxate continue. These should be read without alarm, distinguishing laboratory or high-dose conditions from actual cosmetic use doses.
Common Belief
With a high SPF, octinoxate protects against UVA too.
A More Contextual Reading
Octinoxate is a UVB filter. UVA protection requires a separate filter and a separate indicator (PPD/PA or the UVA circle).
Scientific Basis
Sources and Their Scope
The following headings indicate areas of research; they are not citations of a specific publication or confirmation that every statement on this page has been verified. The links provided should be read with their individual scope in mind.
- International INCI / CosIng database
- Regulatory authority documents (EU SCCS, TİTCK)
- Dermocosmetic research publications
TİTCK, SCCS and similar regulatory authorities are mentioned in the context of publicly available regulation; Klaris has no official endorsement, partnership or collaboration with these institutions.
Source Links
Database records provide ingredient identity and registration information; on their own, they do not establish the effect of a finished product or its suitability for a profile. Search links are not specific research papers.
iv. Related Ingredients
Ingredients Often Read Together
v. UV Filters Family
Other Ingredients in the Same Family
Explore ingredients in the same functional family to deepen your reading of formulas.
vi. Academy · Related Reading
For a Closer Look
Klaris · Example Analyses
How Does Octinoxate (Organic UV Filter) Feature
in Your Products?
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