Ingredient review
Ethyl Methoxycinnamate
INCI: Ethyl Methoxycinnamate
Ethyl Methoxycinnamate is an effective UVB filter, but its safety has been debated due to potential skin absorption and environmental concerns.
In plain English
Ethyl Methoxycinnamate, also known as Octinoxate or OMC, is a synthetic ingredient used in sunscreens and other products to absorb UVB rays from the sun. It helps prevent sunburn and protects the skin from some types of sun damage. However, it has raised some safety questions because a small amount can be absorbed into the body, and it may have environmental effects on coral reefs. Many sunscreens now use alternative filters to avoid these concerns.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is relatively strong for its common cosmetic role.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- strong
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ethyl Methoxycinnamate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Ethyl Methoxycinnamate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
strongThere is a stronger practical or research basis for the ingredient role described here.
What it is
Ethyl Methoxycinnamate is a clear, oily liquid that belongs to a class of chemicals called cinnamates. It is one of the most widely used UVB filters in sunscreens worldwide, known for its ability to absorb UVB radiation (280–320 nm) and convert it into harmless heat.
How it works
When applied to the skin, Ethyl Methoxycinnamate forms a thin film that absorbs UVB rays before they can penetrate the skin. The absorbed energy is then released as heat, reducing the risk of sunburn and DNA damage. It is often combined with other sunscreen ingredients to provide broad-spectrum protection (covering both UVA and UVB rays).
Pros
Strong UVB protection
Effectively absorbs UVB rays, reducing the risk of sunburn and short-term sun damage.
Cosmetically elegant
Has a lightweight, non-greasy feel that blends easily into formulations, making it popular in daily-use sunscreens and makeup.
Cons and cautions
Skin absorption concerns
Studies show it can be absorbed into the bloodstream, and the FDA has requested more safety data regarding long-term systemic exposure.
Environmental impact
It is not readily biodegradable and has been linked to coral reef bleaching, leading to bans in some regions like Hawaii and Key West.
Best for
- People looking for effective UVB protection in a lightweight sunscreen
- Those who do not have sensitive skin or concerns about chemical sunscreen absorption
Use caution if
- Individuals with very sensitive or reactive skin who prefer mineral sunscreens
- People concerned about potential endocrine effects or environmental impact on coral reefs
Usage tips
Safety summary
Ethyl Methoxycinnamate is generally considered safe for topical use in sunscreens at approved concentrations, but concerns about skin absorption and potential endocrine effects have led to ongoing regulatory review. It is not recommended for use on damaged or broken skin, and those with concerns may prefer mineral sunscreens.
Research notes
Numerous studies confirm its effectiveness as a UVB filter. However, research also shows it can be absorbed through the skin and has been detected in blood, urine, and breast milk. Animal studies have suggested possible endocrine disruption, but human studies are limited and inconclusive. Environmental studies indicate it can harm coral reefs, leading to bans in some areas.
Common label clues
- Typical concentration
- Up to 10% in the US, up to 7.5% in the EU and other regions
- Regulatory status
- Approved for use in sunscreens in the US, EU, and many other countries, but the FDA has requested additional safety data as part of its ongoing review of sunscreen ingredients. Some regions (e.g., Hawaii, Palau) have banned it due to environmental concerns.
- Common uses
- Sunscreens, Moisturizers with SPF, Makeup with SPF, Lip balms
- Environmental note
- Ethyl Methoxycinnamate has been detected in seawater and marine organisms, and studies suggest it may contribute to coral bleaching. As a result, it is banned in several marine-sensitive areas.
Good to know
- Ethyl Methoxycinnamate is often listed as Octinoxate on product labels
- It is banned in some places due to environmental concerns, so check local regulations if traveling
- The FDA has not yet concluded that it is safe for long-term daily use, pending further studies
Common questions
What is Ethyl Methoxycinnamate in beauty products?
Ethyl Methoxycinnamate, also known as Octinoxate or OMC, is a synthetic ingredient used in sunscreens and other products to absorb UVB rays from the sun. It helps prevent sunburn and protects the skin from some types of sun damage. However, it has raised some safety questions because a small amount can be absorbed into the body, and it may have environmental effects on coral reefs. Many sunscreens now use alternative filters to avoid these concerns.
What does Ethyl Methoxycinnamate do in a beauty product?
When applied to the skin, Ethyl Methoxycinnamate forms a thin film that absorbs UVB rays before they can penetrate the skin. The absorbed energy is then released as heat, reducing the risk of sunburn and DNA damage. It is often combined with other sunscreen ingredients to provide broad-spectrum protection (covering both UVA and UVB rays).
Is Ethyl Methoxycinnamate safe for most people?
Ethyl Methoxycinnamate is generally considered safe for topical use in sunscreens at approved concentrations, but concerns about skin absorption and potential endocrine effects have led to ongoing regulatory review. It is not recommended for use on damaged or broken skin, and those with concerns may prefer mineral sunscreens.
Who should be careful with Ethyl Methoxycinnamate?
Individuals with very sensitive or reactive skin who prefer mineral sunscreens People concerned about potential endocrine effects or environmental impact on coral reefs
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.