Ingredient · Organic UVB Filter
Iscotrizinol (UVB Filter)
INCI · Diethylhexyl Butamido Triazone
Related names and forms: Uvasorb HEB · Iscotrizinol. This list does not indicate synonyms or exact ingredient matches.
Iscotrizinol (INCI: Diethylhexyl Butamido Triazone; trade name Uvasorb HEB) is a photostable, high-molecular-weight UVB filter from the triazine family. Labels show 'Diethylhexyl Butamido Triazone'. Its large molecular structure is associated with a tendency to remain at the skin's surface, a desirable sunscreen-filter feature because protection takes place there. It works only in UVB. Modern broad-spectrum combinations use it to strengthen UVB coverage alongside UVA filters such as Uvinul A Plus, Tinosorb and Mexoryl. Being a relatively newer-generation, photostable filter makes it a choice for protection throughout the day. Klaris considers its UVB contribution, complementary UVA filters and formula balance together. A broad spectrum comes from the compatibility of the combination, not a single filter.
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 Protection
A light-resistant organic filter effective in UVB.
High Molecular Weight
Its large molecular structure is associated with a tendency to remain at the skin's surface.
Broad-Spectrum Combination
Contributes to a balanced protection profile alongside UVA filters.
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 triazine chromophore. It has no UVA effect, so a complementary filter is needed.
Step 2
High Molecular Weight
Its large molecular structure is associated with remaining at the surface, functional because sun protection takes place there.
Step 3
High Photostability
Its light-resistant structure helps the system support UVB protection throughout the day.
Step 4
Broad-Spectrum Combination
Contributes to a balanced protection profile alongside UVA filters.
ii. Role in the Formula
How Is It Read on a Label?
Iscotrizinol is a photostable UVB filter regulated by cosmetic legislation. It is generally used alongside UVA filters such as Uvinul A Plus and Tinosorb in balanced broad-spectrum formulas. Conditions of use are assessed within formula and market regulations.
A Closer Look · pH, Stability, Synergy
Iscotrizinol is a photostable filter strengthening UVB coverage in modern sunscreens. High molecular weight is associated with a tendency to remain at the skin's surface, considered positive for a sunscreen filter because protection takes place there. It dissolves in the oil phase and suits systems with other oil-soluble filters. Working only in UVB, it needs a complementary UVA filter such as Uvinul A Plus, Tinosorb S/M or Mexoryl for a broad spectrum; alone it is not considered sufficient for that claim. Its relatively newer-generation and photostable nature makes it a choice for protection throughout the day. Regional regulations may differ, so Klaris describes conditions in general terms without unsourced specific limits. Newer-generation filters are discussed in a low-irritation context for sensitive profiles; patch testing a new product is measured. Klaris considers UVB contribution, complementary UVA coverage, broad-spectrum balance and texture as a whole.
Typical Concentration Range
1% - 10% (within conditions set by regulations)
Ingredient Family
UV Filters
iii. Sensitivity Advisory
A Note on Extra Care in Context
Newer-generation filters are generally described as low-irritation; individual sensitivity may be reported in sensitive profiles. Patch testing is a measured approach.
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
Iscotrizinol provides broad-spectrum protection alone.
A More Contextual Reading
Iscotrizinol works only in UVB; broad-spectrum coverage requires a complementary UVA filter.
Common Belief
Its high molecular weight means it cannot enter skin and is useless.
A More Contextual Reading
Sunscreen protection occurs at the skin's surface. Remaining there is not a disadvantage, but an expected, positive feature.
Common Belief
As a newer-generation UVB filter, it is always better than older filters.
A More Contextual Reading
Although it offers a photostability advantage, 'always better' depends on context. The complete formula and protection balance matter.
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)
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
Ingredient · Organic UVB Filter
Uvinul T 150 (UVB Filter)
INCI · Ethylhexyl Triazone
Ingredient · Organic UVA Filter
Uvinul A Plus (UVA Filter)
INCI · Diethylamino Hydroxybenzoyl Hexyl Benzoate
Ingredient · Broad-Spectrum Organic Filter
Tinosorb S (Broad-Spectrum Filter)
INCI · Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
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 Iscotrizinol (UVB Filter) Feature
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