Ingredient · Broad-Spectrum Organic Filter
Tinosorb S (Broad-Spectrum Filter)
INCI · Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
Related names and forms: Bemotrizinol. This list does not indicate synonyms or exact ingredient matches.
Tinosorb S, or bemotrizinol, is an organic UVA and UVB filter used in sunscreens. Organic describes its chemical structure here, not organic-farming certification. Its long INCI name is Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, so the absence of Tinosorb S on the front label does not mean the filter is absent. Alongside the ingredient list, check SPF, UVA or broad-spectrum labelling and directions. The sunscreen-selection guide below explains these together.
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.
UVA and UVB Absorption
It can form part of a broad-spectrum filter system.
Photostability
Stability under light does not mean all-day protection without reapplication.
Formula Design
Its oil-soluble form is considered within the product's delivery system.
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
UV Absorption
Absorbing UVA and UVB wavelengths contributes to the formula's protection.
Step 2
Light Stability
Photostability concerns chemical stability under light, not an unchanged sunscreen film throughout the day.
Step 3
Tested Formula
The accompanying filters and delivery system affect the result.
ii. Role in the Formula
How Is It Read on a Label?
The filter combination, solubility and film formed on skin all matter. Finished-product tests establish SPF and UVA performance; one filter name cannot guarantee a light texture, no white cast or higher protection.
A Closer Look · pH, Stability, Synergy
BASF technical information describes broad-spectrum absorption, photostability and oil solubility for Tinosorb S. These raw-material properties do not establish a finished product's texture or protection claims. Permitted conditions differ between markets. The FDA added bemotrizinol to the US sunscreen monograph in June 2026; this does not make other countries' conditions identical. A new or photostable filter does not override the product's reapplication instructions.
Typical Concentration Range
Depends on market regulation and the finished formula
Ingredient Family
UV Filters
iii. Sensitivity Advisory
A Note on Extra Care in Context
Follow the sunscreen label; reapply at least every two hours outdoors and after swimming or sweating. Shade and protective clothing also matter.
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
A photostable filter needs no reapplication all day.
A More Contextual Reading
Light stability does not prevent product loss through water, sweat or rubbing.
Common Belief
Tinosorb S reveals the SPF.
A More Contextual Reading
SPF comes from testing the finished product, not from one ingredient.
Common Belief
Bemotrizinol is a separate trade name.
A More Contextual Reading
Bemotrizinol is the substance name; Tinosorb S is a trade name.
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 RecordBASF · Tinosorb S Technical Product Information (Supplier)
- Regulatory DocumentFDA · Sunscreen Monograph: Regulatory Actions
- Regulatory DocumentFDA · Sun Protection and Reapplication
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
Ingredient · Broad-Spectrum Hybrid Filter
Tinosorb M (Hybrid Filter)
INCI · Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
Ingredient · Organic UVA Filter
Uvinul A Plus (UVA Filter)
INCI · Diethylamino Hydroxybenzoyl Hexyl Benzoate
Ingredient · Chemical (Organic) UV Filter
Avobenzone (Chemical UV Filter)
INCI · Butyl Methoxydibenzoylmethane
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
7 Min Read
How to Choose Sunscreen: Mineral and Chemical Filters
SPF, broad-spectrum protection, mineral and chemical filters, and choosing for your profile.
5 Min Read
How to Read an INCI List
What the Latin names on a label mean, how ingredients are ordered and what they can tell you about proportions.
Klaris · Example Analyses
How Does Tinosorb S (Broad-Spectrum Filter) Feature
in Your Products?
Explore product examples to see the ingredient list, general assessment and match score that changes with the example profile together.
Masked products and example profiles, not a personal analysis. Profile matching in the app is part of Klaris Premium. The app is currently available in Turkish. An English version is in preparation.