Ingredient review
Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate
INCI: Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate
A highly effective, photostable sunscreen ingredient that provides broad-spectrum protection with minimal irritation risk.
In plain English
This is a synthetic sunscreen ingredient that works like a tiny shield on your skin. It absorbs and reflects both UVA (aging) and UVB (burning) rays, helping prevent sun damage. Unlike some older filters, it stays stable in sunlight and is less likely to cause stinging or irritation.
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
Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate 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 Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate.
- 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
A synthetic organic UV filter that is a large molecule, meaning it stays mostly on the surface of the skin rather than being absorbed deeply. It is often used in combination with other sunscreens to boost UVA protection.
How it works
It absorbs UV radiation and converts it into harmless heat, while also scattering some UV light due to its particle size. This dual action provides broad-spectrum protection that lasts longer than many other filters.
Pros
Excellent photostability
Unlike some UV filters that degrade quickly in sunlight, this ingredient remains effective for longer, meaning your sunscreen stays protective.
Gentle on skin
Its large molecular size means it sits on the skin's surface rather than penetrating, reducing the chance of irritation or stinging.
Cons and cautions
May leave a white cast
Because it is a particulate filter, it can reflect visible light, which may appear as a pale or whitish tint on darker skin tones.
Environmental persistence
This synthetic compound is not readily biodegradable, raising concerns about accumulation in waterways and marine life.
Best for
- Anyone seeking reliable broad-spectrum sun protection
- People with sensitive or reactive skin who struggle with chemical sunscreens
Use caution if
- Those who prefer 100% mineral sunscreens
- Individuals with known allergy to triazine compounds (rare)
Usage tips
Safety summary
Considered safe for topical use in concentrations up to 10% by the EU Scientific Committee on Consumer Safety. It has low skin penetration and low irritation potential. However, environmental persistence is a concern.
Research notes
Multiple studies confirm its efficacy as a broad-spectrum UV filter with high photostability. Human patch tests show very low rates of sensitization. Environmental studies indicate it can accumulate in aquatic ecosystems.
Common label clues
- Typical concentration
- Up to 10% in leave-on products
- Regulatory status
- Approved as a UV filter in the EU, Australia, and many Asian countries. Not currently approved by the US FDA for use in sunscreens.
- Common uses
- Sunscreens, Moisturizers with SPF, BB creams, Makeup with SPF
- Environmental note
- Studies have detected this compound in water samples, indicating it may persist in the environment. Research on its ecological impact is ongoing.
Good to know
- Often listed on labels as Tinosorb M or Methylene Bis-Benzotriazolyl Tetramethylbutylphenol.
- Approved in Europe and Asia, but not yet FDA-approved for use in the US.
- Works well with avobenzone to keep it from breaking down.
Common questions
What is Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate in beauty products?
This is a synthetic sunscreen ingredient that works like a tiny shield on your skin. It absorbs and reflects both UVA (aging) and UVB (burning) rays, helping prevent sun damage. Unlike some older filters, it stays stable in sunlight and is less likely to cause stinging or irritation.
What does Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate do in a beauty product?
It absorbs UV radiation and converts it into harmless heat, while also scattering some UV light due to its particle size. This dual action provides broad-spectrum protection that lasts longer than many other filters.
Is Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate safe for most people?
Considered safe for topical use in concentrations up to 10% by the EU Scientific Committee on Consumer Safety. It has low skin penetration and low irritation potential. However, environmental persistence is a concern.
Who should be careful with Disodium Bisethylphenyl Triaminotriazine Stilbenedisulfonate?
Those who prefer 100% mineral sunscreens Individuals with known allergy 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.