Description

2-(3-Allyl-2-Hydroxy-5-Methylphenyl)-2H-Benzotriazole is a specialized benzotriazole derivative that functions as a highly effective ultraviolet (UV) light absorber and stabilizer. This compound is critical for protecting polymers and coatings from photodegradation, thereby extending product lifespan and maintaining material integrity. It is primarily needed by manufacturers in the polymer, plastics, and specialty coatings industries seeking advanced solutions for UV stabilization.

Application

• As a primary UV light absorber and stabilizer in polyolefins (PP, PE) and engineering plastics.
• For enhancing the light fastness and weatherability of automotive coatings, industrial paints, and wood finishes.
• In the stabilization of adhesives, sealants, and synthetic fibers against UV-induced degradation.
• As an additive in agricultural films and outdoor construction materials to prevent embrittlement and color change.
• For use in packaging materials where UV protection is required to preserve contents.
• In the formulation of cosmetic and personal care products that require UV filtering properties.
• As a research chemical and intermediate in the development of novel photostabilizers and organic synthesis.

Basic Information

Product Name	2-(3-Allyl-2-Hydroxy-5-Methylphenyl)-2H-Benzotriazole
CAS No.	2170-39-0
Molecular Formula	C16H15N3O
Molecular Weight	265.31 g/mol
Synonyms	UV-5411; 2-(2-Hydroxy-5-methyl-3-allylphenyl)-2H-benzotriazole; 2H-Benzotriazole, 2-(3-allyl-2-hydroxy-5-methylphenyl)-; Tinuvin 329 (analog); 3-Allyl-2-hydroxy-5-methylphenylbenzotriazole; Benzotriazole UV absorber; Light stabilizer 5411; 2-(3-Allyl-2-hydroxy-5-methylphenyl)benzotriazole
EINECS	218-524-7

Quality Control

Our production of 2-(3-Allyl-2-Hydroxy-5-Methylphenyl)-2H-Benzotriazole adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry benchmarks. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C/59-77°F). Due to its light-sensitive nature and propensity to be easily oxidized, it is recommended to store the material under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	128°C - 132°C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%
UV Absorption (λ max)	Conforms

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