Bisoctrizole (Tinosorb M, CAS 103597-45-1) is a broad-spectrum UV filter combining UVB and UVA protection with excellent photostability. As an organic microparticle dispersion, it also provides some visible-light scattering — ideal for high-performance, photostable sunscreens.
Physical & Chemical Properties
- INCI: Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
- CAS number: 103597-45-1
- Appearance: white to slightly yellowish powder / aqueous dispersion
- Solubility: practically insoluble in water and oils (microparticle dispersion)
- Molecular formula: C41H50N6O2
- Absorption: broad UVB + UVA (290–390 nm)
- Photostability: excellent — does not degrade under UV
Key Benefits for Formulation
- Broad-spectrum protection: UVB + UVA in a single filter
- Excellent photostability: no significant degradation under UV exposure
- Visible-light scattering: contributes to whitening control in formulations
- Low skin penetration: remains on skin surface for safety
- High-performance: ideal for high-SPF, photostable systems
Main Applications
- Sunscreens: high-SPF broad-spectrum protection
- Day creams & moisturizers: daily UV defense
- Children’s sunscreens: gentle, photostable protection
- Sports & outdoor products: long-exposure stability
- Makeup & BB creams: SPF-rated color cosmetics
Why Choose Our Bulk Bisoctrizole (Tinosorb M)?
- GMP manufacturing: full quality control from raw material to finished product
- Complete documentation: COA, SDS and heavy metal test reports available on request
- Flexible supply: MOQ and lead time on inquiry, from R&D samples to mass production
- Export experience: reliable shipping to EU, North America, Australia and Middle East
Recommended Usage
Typical use level up to 10% (EU-regulated maximum). Usually supplied as an aqueous dispersion; combine with oil-soluble UVB filters for optimized SPF and texture.
FAQ About Wholesale Bisoctrizole (Tinosorb M)
What is the CAS number of Bisoctrizole?
CAS 103597-45-1 (Tinosorb M).
What is the INCI name?
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol.
What spectrum does Bisoctrizole cover?
Broad UVB + UVA protection (290–390 nm) with excellent photostability.
Is it water or oil soluble?
It is practically insoluble in both — supplied as an organic microparticle dispersion.
What is the maximum use level?
Up to 10% in the EU; verify local limits for your market.
Is it photostable?
Yes — it is one of the most photostable UV filters available.
Is it suitable for children’s sunscreen?
Its low penetration and gentle profile make it a common choice for children’s products.
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