UV-A/UV-B Filter
Sunbest-MBT
INCI: Methylene Bis-benzotriazolyl Tetramethylbutylphenol

Formulator notes
Broad-spectrum particulate filter (peaks 305 and 360 nm) supplied as an aqueous dispersion. Mainly absorbs UV, with some scattering, and is highly photostable. Use 1-10% as MBBT active.
Hold it The molecule in AR on a phone, in 3D anywhere else.
Open in the SPF Lab An in-silico simulator over the Sunbest range, pre-loaded with this filter.
Highlights
- Broad-spectrum particulate filter: mainly absorbs UV, with some scattering.
- Excellent photostability.
Technical data
| INCI name | Methylene Bis-benzotriazolyl Tetramethylbutylphenol |
|---|---|
| Also known as | MBBT, MBT, Bisoctrizole |
| IUPAC name | 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] |
| CAS number | 103597-45-1 |
| EC number | 403-800-1 |
| HSN code | 29339990 |
| Type | UV-A/UV-B Filter |
| Form | Powder or Liquid |
| Solubility | Insoluble in water and oils; supplied as an aqueous particle dispersion |
| Typical dosage | 1-10% (as MBBT active; nano + non-nano combined) |
| UV profile | UV-B and UV-A: peak absorption at 305nm and 360nm. |
| UV band | Broad-spectrum |
| Peak absorption (nm) | 360 |
| Molecular weight (g/mol) | 658.9 · High for a UV filter (over 500 g/mol) |
| Pack size (kg) | 25 |
| MOQ (kg) | 300 |
| Shelf life (years) | 1-3 |
| REACH registered | No |
| REACH regions | - |
| REACH tonnage band | - |
Applications
- Sunscreens & SPF Products
- Foundations & BB Creams
- Lip Care (Balms, Lipsticks)
Frequently asked
What is Sunbest-MBT?
Sunbest-MBT is UV-A/UV-B filter, INCI name Methylene Bis-benzotriazolyl Tetramethylbutylphenol (CAS 103597-45-1), supplied by Vinner Labs for sunscreens & SPF products.
What is the typical use level of Sunbest-MBT?
The typical dosage of Sunbest-MBT is 1-10% (as MBBT active; nano + non-nano combined) in finished formulations. Exact levels depend on the application and regional regulations.
What is Sunbest-MBT soluble in?
Sunbest-MBT is soluble in: Insoluble in water and oils; supplied as an aqueous particle dispersion.
Related ingredients
Samples & documentation
Request a sample, spec sheet, quotation or regulatory statement for Sunbest-MBT, ask a specialist.