Description

2-(2'-Hydroxy-3'-sec-Butyl-5'-tert-Butylphenyl)Benzotriazole is a high-performance, hindered amine light stabilizer (HALS) belonging to the benzotriazole class of UV absorbers. It is engineered to provide exceptional long-term protection for polymers and coatings against photodegradation caused by ultraviolet radiation. This compound is essential for manufacturers in the plastics, automotive, and packaging industries seeking to enhance product durability and lifespan. Its specific molecular structure offers superior compatibility and low volatility in demanding applications.

Application

This specialized UV absorber is designed for high-performance stabilization across multiple sectors:

• Polymer Stabilization: Primary use as a light stabilizer in polyolefins (PP, PE), PVC, polycarbonates, and engineering plastics to prevent yellowing, cracking, and loss of mechanical properties.
• Automotive & Industrial Coatings: Protection for automotive clear coats, refinish paints, and industrial coatings from UV-induced gloss loss and chalking.
• Advanced Packaging: Extending the shelf life and maintaining the clarity of films and rigid packaging, especially for UV-sensitive contents.
• Adhesives & Sealants: Enhancing the weatherability and performance longevity of high-end adhesive formulations.
• Agricultural Films: Stabilizing greenhouse and mulch films to withstand prolonged sun exposure.
• Synthetic Fibers & Textiles: Protecting fibers and fabrics from color fading and strength degradation.

Basic Information

Product Name	2-(2'-Hydroxy-3'-sec-Butyl-5'-tert-Butylphenyl)Benzotriazole
CAS No.	36437-37-3
Molecular Formula	C20H25N3O
Molecular Weight	323.44 g/mol
Synonyms	UV-350; Tinuvin 350; 2-(2H-Benzotriazol-2-yl)-4-(1,1-dimethylethyl)-6-(1-methylpropyl)phenol; 2-(2'-Hydroxy-3'-(1-methylpropyl)-5'-tert-butylphenyl)benzotriazole; Bumetrizole; Sec-butyl derivative of Tinuvin 326; Light stabilizer 350; Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1-dimethylethyl)-6-(1-methylpropyl)-
EINECS	253-037-1

Quality Control

Our production of 2-(2'-Hydroxy-3'-sec-Butyl-5'-tert-Butylphenyl)Benzotriazole adheres to stringent quality management systems. Every batch is subjected to comprehensive analytical testing, including HPLC for purity, IR for identification, and loss on drying, to ensure it meets precise specifications for performance as a light stabilizer. Certificates of Analysis (COA) are provided and the material is manufactured in compliance with relevant global chemical regulations, including REACH.

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 heat sources and incompatible materials. The product is light-sensitive and should be stored away from light to maintain efficacy.

Specification

Item	Specification
Appearance	Light yellow to off-white powder or crystals
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.5%
Melting Point	138°C - 145°C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Transmittance (425 nm / 500 nm)	≥ 97% / ≥ 98%

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