Bemotrizinol (BEMT, CAS 187393‑00‑6)

Broad-Spectrum UV Filter & Photostabilizer

High‑purity Bemotrizinol powder (≥98%), a fat-soluble UV-A/B filter with excellent photostability. Widely used in sunscreen and polymer research. For laboratory use only.

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Description

BEMT Overview

Bemotrizinol, also known as BEMT or Tinosorb S, is a highly effective and photostable broad-spectrum ultraviolet (UV-A/B) filter with absorption peaks around 310 nm and 340 nm.  It enhances photostability in sunscreens and exhibits low skin penetration (<98% stability after 50 MEDs), making it a trusted ingredient in cosmetic and polymer research.

Strategically used to stabilize other UV absorbers like avobenzone and to achieve EU/Australia UVA standards at as low as 1.8% concentration.

Product Specifications

Product Name BEMT (Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine)
CAS Number 187393-00-6
Molecular Formula C38H49N3O5
Molecular Weight 627.82 g/mol
Appearance Yellowish powder or granules
Purity ≥98%
Solubility Oil-soluble, not water-soluble
Grade Cosmetic Grade
Shelf Life 24 months
Packaging 1kg/bag, 25kg/drum or customized
Storage Store in a cool, dry place away from light

Key Features

  • Broad-Spectrum UV protection from UV-A and UV-B rays
  • Photostable compound that enhances the durability of sunscreens and reduces ingredient degradation
  • Synergistic stabilizer for filters like avobenzone and bis-ethylhexyloxyphenol methoxyphenyl triazine
  • Low skin absorption and irritation potential, with no measurable estrogenic activity

Application Areas

  • Sunscreen formulations (face, body, sprays) requiring high UVA protection
  • Photostabilization in cosmetic emulsions and polymer coatings
  • UV-blocking haircare and textiles
  • Material science research involving UV-resistant polymers
Formulation Guidelines
  • Usage: Typically 2%–6% based on product type and regional regulations
  • Compatibility: Oil-soluble; ideal for oil phases in formulations
  • Synergies: Works best paired with avobenzone, ethylhexyl triazone, or MBBT for enhanced SPF stability
Frequently Asked Questions

Q: Why is Bemotrizinol often chosen for UVA protection?
A: It provides broad-spectrum UV-A/B coverage, exhibits excellent photostability, and enhances SPF when combined with other filters.

Q: Is it allowed in U.S. sunscreens?
A: Not yet FDA-approved for U.S. use, but widely permitted in the EU, Australia, and other markets .

Q: What makes Bemotrizinol different from other filters?
A: It offers higher photostability, low skin penetration, and synergistic benefits when combined with other UV filters .

Safety & Handling

  • Irritation potential: Low, but standard PPE (gloves, goggles) recommended
  • Storage: Keep sealed in cool, dry places away from light
  • Research Use Only: Not intended for therapeutic, food, or consumer ingestion use
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Shipping & Delivery

We offer flexible shipping solutions tailored to different product types and customer needs.

Shipping Methods:

  1. Express Courier (DHL / UPS / FedEx): Fast delivery (3–10 business days), suitable for small and urgent shipments.
  2. Air Freight: 7–15 days, ideal for mid-sized bulk orders.
  3. Sea Freight: 15–45 days, recommended for large-scale cargo with cost-efficiency.

We also support delivery to bonded warehouses or third-party consolidators if necessary, and can also cooperate with customers for customs clearance services.

Packaging & Protection:

All shipments are packed with moisture-proof, shock-resistant materials. Cold chain packaging is used for temperature-sensitive items.

  • Lab-grade Powders: 1g / 5g glass vials
  • Bulk Products: 25kg fiber drums or customized packaging
  • Custom Packaging: Available for special regulatory or branding needs

Tracking & Support:

Tracking number will be provided within 48 hours of shipment. Our logistics team monitors all shipments and supports real-time updates.

Damage or Loss Handling:

We provide full transportation insurance and use protective packaging. If the goods are damaged or lost, please provide specific materials (pictures/videos) and we will have a corresponding compensation policy. The specific content depends on the value of the product or the specific order situation. You can consult your sales agent or contact us directly.

FAQ
How can I confirm the quality and purity of your products?

All products undergo strict internal QC and come with full documentation, including COA, HPLC/GC/MS data (where applicable), and SDS. Purity is typically ≥ 98–99% depending on product type.

What documents do you provide with shipments?

We provide a standard set of documents including COA, MSDS/SDS, Packing List, and Commercial Invoice.

What are your available packaging options?

Packaging varies by product type:

  • Peptides & Powders: 1g/5g vials or aluminum foil pouches

  • Bulk Chemicals: 25kg fiber drums, HDPE drums, or steel drums

  • Customized: Available for temperature-sensitive or hazardous materials (cold chain, gas-filled, lined bags)

What are your shipping methods and timelines?

We offer flexible shipping options:

  • Express (DHL/UPS/FedEx): 3–10 working days

  • Air Freight: 7–15 days

  • Sea Freight: 15–45 days

We also support delivery to bonded warehouses or third-party consolidators if necessary, and can also cooperate with customers for customs clearance services.


Do you support custom synthesis or formulations?

While we do not currently offer custom synthesis services, our technical team is happy to assist you in selecting the most suitable standard product for your needs or answering questions related to specifications and applications.

Is a sample available before placing a bulk order?

Yes, samples are available for most items. Shipping and sample fees apply but can be offset against your first confirmed order.

What is your typical lead time?
  • For in-stock products: 2–5 working days.
  • For make-to-order or limited availability products: 1–3 weeks depending on production schedule and documentation preparation.
Do you support export to Europe / North America / Australia?

Yes, we regularly ship to over 30 countries including the US, Germany, UK, Australia, Canada, and others. Our logistics partners ensure fast and compliant international delivery.

What if I receive damaged or missing goods?

We provide full transportation insurance and use protective packaging. If the goods are damaged or lost, please provide specific materials (pictures/videos) and we will have a corresponding compensation policy. The specific content depends on the value of the product or the specific order situation. You can consult your sales agent or contact us directly.

How can I get support if I have technical or regulatory questions?

Our support team is available 24/7 via email or instant messaging. Whether you need a product quote, documentation, or help with logistics, we're here to help you every step of the way.

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