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    HomeProductsDaily ChemicalsCosmetic Raw MaterialsDrometrizole Trisiloxane CAS 155633-54-8
    • Drometrizole Trisiloxane CAS 155633-54-8

    Drometrizole Trisiloxane CAS 155633-54-8

    Drometrizole Trisiloxane (CAS 155633-54-8) is a photostable UV absorber utilized as a broad-spectrum protective agent in high-performance cosmetic formulations and sunscreens. Chemically identified as 2-(2H-Benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]disiloxanyl]propyl]phenol, this viscous lipophilic liquid functions to filter both UVA and UVB radiation, preventing photodegradation of skin and product ingredients. As a specialized Benzotriazole silicone derivative, it is extensively integrated into anti-aging creams, hair care products, and color cosmetics to enhance solar protection factors (SPF) and photostability. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific purity and solubility requirements. Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

    • CAS: 155633-54-8
    • Synonyms: Drometrizole trisiloxane, Mexoryl XL, 2-(2H-Benzotriazol-2-yl)-4-methyl-6-(2-methyl-3-(1,3,3,3-tetramethyl-1-(trimethylsilyloxy)disiloxanyl)propyl)phenol, Silatriazole UV absorber
    • Einecs: 417-010-9
    • Molecular Formula: C24H39N3O3Si3
    • Grade: Cosmetic Grade (High Purity)
    • Package: 20kg or 25kg Fiber Drum / Carton
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    Product Description

    Drometrizole Trisiloxane is a benzotriazole derivative integrated with a silicone chain. This unique molecular structure gives it dual advantages: the potent UV-absorbing capability of the benzotriazole group and the excellent solubility and film-forming properties of the silicone group.

    Unlike some traditional UV filters that degrade under sunlight, Drometrizole Trisiloxane is highly photostable, maintaining its protective efficacy over time. It is oil-soluble, making it ideal for formulating water-resistant sunscreens. It works synergistically with other water-soluble UV filters to create a complete broad-spectrum defense system in emulsion systems (O/W or W/O).

    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    Test ItemSpecification (Standard)
    AppearanceWhite to off-white crystalline powder
    IdentificationConsistent with standard spectrum
    Assay (Purity)≥ 98.0%
    Melting Point50.0°C – 55.0°C
    Loss on Drying (Volatile Matter)≤ 0.5%
    Extinction Coefficient (E 1%/1cm)≥ 360 (at 303nm)
    Heavy Metals≤ 10 ppm
    SolubilityInsoluble in water; Soluble in oil and esters
    Absorbance WavelengthPeak absorption in both UVB and short UVA range

    Applications

    1. Sun Care: A primary active ingredient in sunscreens, sunblocks, and tanning oils. It boosts the SPF value and UVA protection factor (PFA).
    2. Daily Skincare: Used in anti-aging day creams and moisturizers to prevent photo-aging caused by daily UV exposure.
    3. Color Cosmetics: Added to foundations, BB creams, and lipsticks to provide sun protection benefits.
    4. Hair Care: Occasionally used in hair products to protect hair fibers and color from fading due to UV radiation.

    Storage Conditions

    • Temperature Control: Critical. The melting point is relatively low (approx. 50-55°C). Store in a cool place, strictly below 30°C, to prevent the powder from fusing or caking into a solid block.
    • Environment: Store in a dry, dark, and well-ventilated area.
    • Packaging: Keep containers tightly sealed to avoid contamination.
    • Shelf Life: 24 months from the production date when stored properly.

    Safety Precautions

    • Handling: Wear protective gloves, safety glasses, and a dust mask when handling the powder to avoid inhalation or contact with mucous membranes.
    • Skin/Eye Contact: Although it is a cosmetic ingredient, pure concentrated powder should be washed off with soap and water if it comes into contact with skin. For eyes, rinse thoroughly with water.
    • Combustibility: Keep away from open flames and heat sources.
    • Disposal: Dispose of contents/container in accordance with local regulations.

    FAQ - Technical & Supply Chain

    • Q:

      How is Drometrizole Trisiloxane CAS 155633-54-8 categorized within the cosmetic ingredients industry?

      A: Drometrizole Trisiloxane (CAS 155633-54-8) is technically classified as a lipophilic benzotriazole derivative, specifically engineered with a siloxane chain to provide superior solubility in oils and broad-spectrum UV filtration.
    • Q:

      Is this UV filter suitable for water-resistant sunscreen formulations?

      A: Yes, this material is typically applied in water-resistant sun care products due to its hydrophobic silicone structure, which enhances film-forming properties and persistence on the skin during water exposure.
    Documents

    Documents and Product Support

    For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

    • COA for batch-based quality reference
    • TDS for key physical and chemical information
    • SDS / MSDS for handling, storage, and safety reference
    • Packing information for sample, trial, and bulk orders
    • Technical communication based on application and specification requirements
    Quotation

    Information to Confirm Before Quotation

    Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

    • Product name and CAS number
    • Application or intended end use
    • Required purity, grade, or specification
    • Sample quantity, trial order, or bulk demand
    • Preferred packing form or net weight
    • Destination country or port
    • Required documents or compliance expectations
    Storage & Handling

    Packaging, Storage, and Handling Notes

    Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

    Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

    Supply Support

    Sample, Bulk Order and Repeat Supply Support

    Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

    For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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    Personal Care Active Silicone UV Filter Sunscreen Ingredient UV Filter Ingredient

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