Ingredient review
Bemotrizinol
INCI: BIS-ETHYLHEXYLOXYPHENOL METHOXYPHENYL TRIAZINE
A highly photostable, broad-spectrum sunscreen filter that offers excellent UVA and UVB protection with minimal irritation risk.
In plain English
Bemotrizinol is a synthetic sunscreen ingredient that works like a sponge to absorb ultraviolet (UV) light from the sun. It protects your skin from both UVA rays (which cause aging and wrinkles) and UVB rays (which cause sunburn). Unlike some older sunscreen filters, it stays stable in sunlight for a long time, so it doesn't break down quickly and keeps protecting your skin. It's often used in combination with other sunscreens to boost overall protection and is considered very gentle on the skin.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
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
Easy yes for most routines
Bemotrizinol 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 Bemotrizinol.
- 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
Bemotrizinol is a synthetic organic compound designed specifically as a broad-spectrum UV filter. It belongs to the triazine family and is known for its high photostability, meaning it doesn't degrade quickly when exposed to sunlight. It is a white to yellowish powder that is oil-soluble and is incorporated into the oil phase of sunscreen formulations.
How it works
Bemotrizinol absorbs UV radiation across both UVA (320-400 nm) and UVB (290-320 nm) wavelengths. When UV light hits the molecule, it absorbs the energy and converts it into harmless heat, which is then released from the skin. Because it is very photostable, it maintains its protective ability for longer periods compared to some other filters, reducing the need for frequent reapplication.
Pros
Excellent photostability
Bemotrizinol remains effective under sunlight for longer than many other chemical filters, meaning you get more reliable protection without needing to reapply as often.
Gentle on sensitive skin
It has a very low irritation and allergy risk, making it a good choice for people with reactive or easily irritated skin who still want chemical sun protection.
Cons and cautions
Synthetic and not eco-friendly
As a synthetic compound, it may not appeal to those seeking natural skincare. It is also not readily biodegradable and has been detected in water sources, raising environmental concerns.
Potential white cast on darker skin
At higher concentrations needed for very high SPF, it can leave a faint white or ashy residue on deeper skin tones, though this is less pronounced than with mineral filters like zinc oxide.
Best for
- Anyone seeking effective, broad-spectrum sun protection
- People with sensitive skin who react to other chemical sunscreens
- Those who want a sunscreen that stays effective longer without frequent reapplication
Use caution if
- Individuals who prefer mineral-only sunscreens for environmental reasons
- Those with known allergies to triazine compounds (rare)
Usage tips
Safety summary
Bemotrizinol is considered safe for use in cosmetics at concentrations up to 10% by global regulatory bodies including the EU Scientific Committee on Consumer Safety. It has low skin penetration, low irritation, and low allergenic potential. However, its environmental impact is a growing concern.
Research notes
Multiple studies confirm bemotrizinol's high photostability and broad-spectrum efficacy. Human patch tests show very low rates of irritation and sensitization. Environmental studies indicate it can persist in water and may affect aquatic organisms, but human health risks are minimal at approved concentrations.
Common label clues
- Typical concentration
- Up to 10% in leave-on products
- Regulatory status
- Approved as a UV filter in the EU, Australia, Japan, and many other countries. Not approved by the FDA for use in sunscreens in the United States as of 2025.
- Common uses
- Sunscreens, Moisturizers with SPF, BB creams, Makeup with SPF
- Environmental note
- Bemotrizinol is not readily biodegradable and has been detected in marine environments. Some studies suggest it may have ecotoxicological effects on aquatic life, though more research is needed.
Good to know
- Bemotrizinol is approved for use in sunscreens in many countries, including the EU, Australia, and Japan, but is not yet FDA-approved in the United States.
- It is often paired with avobenzone to stabilize it and boost UVA protection.
Common questions
What is Bemotrizinol in beauty products?
Bemotrizinol is a synthetic sunscreen ingredient that works like a sponge to absorb ultraviolet (UV) light from the sun. It protects your skin from both UVA rays (which cause aging and wrinkles) and UVB rays (which cause sunburn). Unlike some older sunscreen filters, it stays stable in sunlight for a long time, so it doesn't break down quickly and keeps protecting your skin. It's often used in combination with other sunscreens to boost overall protection and is considered very gentle on the skin.
What does Bemotrizinol do in a beauty product?
Bemotrizinol absorbs UV radiation across both UVA (320-400 nm) and UVB (290-320 nm) wavelengths. When UV light hits the molecule, it absorbs the energy and converts it into harmless heat, which is then released from the skin. Because it is very photostable, it maintains its protective ability for longer periods compared to some other filters, reducing the need for frequent reapplication.
Is Bemotrizinol safe for most people?
Bemotrizinol is considered safe for use in cosmetics at concentrations up to 10% by global regulatory bodies including the EU Scientific Committee on Consumer Safety. It has low skin penetration, low irritation, and low allergenic potential. However, its environmental impact is a growing concern.
Who should be careful with Bemotrizinol?
Individuals who prefer mineral-only sunscreens for environmental reasons Those with known allergies to triazine compounds (rare)
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.