Description

Drometrizole Trisiloxane is a specialized organosilicon derivative of the benzotriazole class, functioning as a highly effective ultraviolet (UV) light absorber and stabilizer. Its core value lies in its exceptional compatibility with silicone-based matrices, providing long-term protection against photodegradation for sensitive materials. This compound is essential for formulators and manufacturers in the personal care, coatings, and high-performance polymer industries seeking to enhance product durability and lifespan under UV exposure.

Application

• Sunscreen and Cosmetic Formulations: Acts as a key UV filter in sunscreens, lotions, and makeup, offering broad-spectrum protection with a silky, non-greasy feel due to its trisiloxane moiety.
• Silicone-based Protective Coatings: Incorporated into clear coats, automotive paints, and industrial coatings to prevent yellowing, cracking, and loss of gloss caused by sunlight.
• Polymer Stabilization: Used as a light stabilizer in plastics (e.g., polycarbonates, polyurethanes) and synthetic fibers to inhibit photo-oxidation and maintain mechanical properties.
• Adhesives and Sealants: Enhances the weatherability and service life of silicone adhesives and sealants used in construction and automotive applications.
• Advanced Material Protection: Applied in optical films, LED encapsulants, and other advanced materials where UV stability is critical for performance.

Basic Information

Product Name	Drometrizole Trisiloxane
CAS No.	155633-54-8
Molecular Formula	C24H39N3O3Si3
Molecular Weight	501.85 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4-methyl-6-[3-(trimethoxysilyl)propyl]phenol; Drometrizole trimethoxysilane; UV Absorber Trisiloxane; Phenol, 2-(2H-benzotriazol-2-yl)-4-methyl-6-[3-(trimethoxysilyl)propyl]-; Benzotriazole silane derivative; Light stabilizer 155633-54-8; Silaflux® BTP (trade name variant)
EINECS	Contact for details

Quality Control

Our Drometrizole Trisiloxane is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for assay and purity, to ensure it meets precise specifications for use in sensitive formulations. A Certificate of Analysis (COA) detailing identity, purity, and relevant physical parameters is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Light yellow to yellow viscous liquid
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 97.0%
Refractive Index (n20/D)	1.520 - 1.540
Specific Gravity (25°C)	1.10 - 1.20

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.