Description

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.

Start Your Bisoctrizole (Tinosorb M) Bulk Order

Contact our sales team today for spec sheets, samples and bulk pricing — our technical team is ready to support your formulation development.