Tinosorb S (Bemotrizinol) - Cosmetic Grade
Product Name: Tinosorb S
INCI Name: BIS-ETHYLHEXYLOXYPHENOL METHOXYPHENYL TRIAZINE
Common Name: Bemotrizinol
CAS Number: 187393-00-6
Storage Conditions: Cool, dry place, sealed containers, protect from light, 15-25°C
Shelf Life: 36 months from manufacturing date under proper storage
Tinosorb S, Bemotrizinol, bis-ethylhexyloxyphenol methoxyphenyl triazine, CAS 187393-00-6, broad spectrum UV filter, photostable sunscreen
Tinosorb S (Bemotrizinol) - Cosmetic Grade-CAS 187393-00-6
Tinosorb S (INCI: Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, also known as Bemotrizinol) is widely regarded as the gold standard premium organic UV filter in modern sun care. Developed by BASF and launched in the early 2000s, this triazine-based filter revolutionized sunscreen formulation with its exceptional efficiency, broad-spectrum coverage, and unmatched photostability.
Key Benefits
✅ Gold standard premium broad-spectrum UV filter✅ Actively photostabilizes other UV filters (avobenzone, octinoxate)
✅ Synergistic SPF boost when combined with other filters
✅ High molecular weight (627.81 Da) - minimal skin penetration
✅ Oil-soluble - easy to formulate in oil phase
✅ Excellent compatibility with all cosmetic ingredients
Applications
Sun Care Products (60% of cosmetic usage):
• High SPF sunscreens (SPF 50+): 5-10% - primary filter, maximum protection
• Daily face sunscreens (SPF 30): 3-6% - elegant, photostable protection
• Body sunscreens: 3-8% - broad spectrum, water-resistant formulas
• Sport / waterproof sunscreens: 5-10% - photostable, long-lasting
• Mineral-chemical hybrid sunscreens: 3-6% - boosts SPF of mineral filters
• Baby & kids sunscreens: 3-6% - gentle, non-irritating, photostable
• Sensitive skin sunscreens: 3-8% - non-sensitizing, hormone-safe
• Tinted sunscreens: 3-6% - protection + light coverage
• Spray sunscreens: 2-5% - easy incorporation, no white cast
• Stick sunscreens: 5-10% - anhydrous, high concentration
• Sunscreen oils: 5-10% - fully oil-soluble, elegant texture
Skin Care with SPF (20%):
• Day creams with SPF: 1-4% - daily anti-photoaging protection
• Anti-aging creams: 1-3% - prevents UV-induced collagen breakdown
• Moisturizers with SPF: 1-3% - subtle everyday protection
• Eye creams with SPF: 0.5-2% - gentle eye area protection
• Brightening creams: 1-3% - prevents UV-induced pigmentation
• Acne treatments with SPF: 1-3% - non-comedogenic, non-irritating
• Serums with SPF: 0.5-2% - lightweight protection boost
• Primer with SPF: 1-3% - smooth base + UV protection
Color Cosmetics (12%):
• BB cream / CC cream: 2-5% - all-in-one care + color + SPF
• Liquid foundation: 1-3% - SPF boost, photostable pigments
• Cushion foundation: 1-3% - buildable coverage + UV protection
• Pressed powder with SPF: 1-3% - setting + touch-up protection
• Tinted moisturizer: 1-3% - light hydration + SPF
• Concealer with SPF: 1-2% - coverage + under-eye protection
Certificate Of Analysis (COA)
Test Item | Specification | Test Result | Test Method |
Product Identification | |||
Product Name | Tinosorb S (Bemotrizinol) | Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine | —— |
INCI Name | BIS-ETHYLHEXYLOXYPHENOL METHOXYPHENYL TRIAZINE | BIS-ETHYLHEXYLOXYPHENOL METHOXYPHENYL TRIAZINE | —— |
CAS Number | 187393-00-6 | 187393-00-6 | —— |
Chemical Formula | C₃₈H₄₉N₃O₅ | C₃₈H₄₉N₃O₅ | —— |
Molecular Weight | 627.81 g/mol | 627.81 g/mol | —— |
Grade | Cosmetic Grade | Premium Cosmetic Grade | —— |
Physical Properties | |||
Appearance | Light yellow fine powder | Pale yellow uniform fine powder | Visual |
Odor | Faint characteristic odor | Very faint, nearly odorless | Olfactory |
Melting Point | 81 - 85°C | 82.5 - 83.5°C | DSC / Capillary |
Loss on Drying | ≤0.5% | 0.18% | 105°C / 2h |
Residue on Ignition | ≤0.1% | 0.04% | 800°C |
Bulk Density | 0.35 - 0.55 g/cm³ | 0.42 g/cm³ | Tapped density |
Chemical Purity | |||
Assay (HPLC) | ≥98.0% | 99.2% | HPLC |
Single Impurity | ≤0.5% | 0.15% | HPLC |
Total Impurities | ≤2.0% | 0.8% | HPLC |
UV Performance | |||
UV Absorption Max 1 | 308 - 312 nm | 310 nm | UV-Vis |
UV Absorption Max 2 | 341 - 345 nm | 343 nm | UV-Vis |
E1,1 at 310 nm | ≥700 | 742 | UV-Vis (1% solution) |
E1,1 at 343 nm | ≥780 | 828 | UV-Vis (1% solution) |
Solubility | |||
Solubility in Ethanol | Clear solution (5%) | Clear, bright yellow solution | Visual |
Solubility in CCT | Soluble (10%) | Fully soluble, clear | Visual |
Insoluble in Water | Pass | Practically insoluble | Visual |
Heavy Metals | |||
Arsenic (As) | ≤2 ppm | <0.5 ppm | ICP-MS |
Lead (Pb) | ≤10 ppm | <1 ppm | ICP-MS |
Cadmium (Cd) | ≤1 ppm | <0.1 ppm | ICP-MS |
Mercury (Hg) | ≤1 ppm | <0.1 ppm | ICP-MS |
Microbiological | |||
Total Aerobic Count | ≤1000 CFU/g | <100 CFU/g | Plate Count |
Yeast & Mold | ≤100 CFU/g | <10 CFU/g | Plate Count |
E. coli | Negative | Negative | —— |
Salmonella | Negative | Negative | —— |
Pseudomonas aeruginosa | Negative | Negative | —— |
Staphylococcus aureus | Negative | Negative | —— |
Photostability Test | |||
Retention after 50 MED | ≥95% | 98.6% | In vitro irradiation |
Regulatory Compliance | |||
EU CosIng (Annex VI) | Compliant | Pass | —— |
China IECIC | Compliant | Pass | —— |
Heavy metals (cosmetic) | Meet limits | All pass | —— |
Final Conclusion | —— | PASSED - MEETS COSMETIC GRADE REQUIREMENTS | —— |
Frequently Asked Questions (FAQ) & Document Request Frequently Asked Questions (FAQ) & Document Request
Q: How much Tinosorb S do I need for a specific SPF? What's the recommended usage level?
A: Tinosorb S is extremely efficient - you need less than you think. But exact SPF depends on the full formula.
General Guidelines:
Target SPF | Typical Tinosorb S Usage | Notes |
SPF 15 | 1.0 - 2.0% | Daily moisturizer, subtle protection |
SPF 30 | 2.5 - 4.0% | Daily face sunscreen, BB cream |
SPF 50 | 4.0 - 6.0% | Body sunscreen, high protection |
SPF 50+ | 5.0 - 8.0% | Maximum protection, sport sunscreens |
SPF 100 (labeled 50+) | 7.0 - 10.0% | Ultra-high protection (max allowed 10%) |
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