Description

Uv Absorber 326 is a highly effective benzotriazole-class ultraviolet light stabilizer widely used in polymer protection. This compound is critical for preventing photo-degradation, which can lead to discoloration, embrittlement, and loss of mechanical properties in sensitive materials. It is an essential additive for manufacturers in the plastics, coatings, and synthetic fiber industries seeking to enhance the long-term durability and aesthetic stability of their products under UV exposure.

Application

• Primary stabilizer in polyolefins (PP, PE) for automotive parts, outdoor furniture, and geotextiles.
• UV protection for engineering plastics such as ABS, polycarbonate, and nylon used in consumer electronics and construction materials.
• Enhancing the lightfastness of industrial and automotive coatings, paints, and varnishes.
• Stabilizing adhesives, sealants, and synthetic fibers against solar radiation.
• Protecting packaging materials to prevent content degradation from UV light.
• Use in masterbatch production for consistent and efficient dispersion in polymer processing.

Basic Information

Item	Detail
Product Name	Uv Absorber 326
CAS No.	3896-11-5
Molecular Formula	C₁₇H₂₀N₃O
Molecular Weight	282.36 g/mol
Synonyms	2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole; UV-326; Tinuvin 326; Bumetrizole; 5-Chloro-2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-benzotriazole; Light Stabilizer 326; Benzotriazole UV Absorber 326; 2-(2H-Benzotriazol-2-yl)-4-methyl-6-(tert-butyl)phenol (chloro derivative)
EINECS	223-445-4

Quality Control

Our Uv Absorber 326 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise technical specifications. We provide full traceability and Certificates of Analysis (COA) are available for all shipments to guarantee consistency and compliance with your formulation requirements.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided even during handling.

Specification

Item	Specification
Appearance	Light yellow to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 99.0%
Melting Point	137 - 141 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Transmittance (425 nm / 500 nm)	≥ 97.0% / ≥ 98.5%

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