Description

2-(5-Chlorobenzotriazol-2-Yl)-4-Methyl-6-tert-Butyl-Phenol is a high-performance benzotriazole derivative widely recognized for its exceptional light-stabilizing properties. This compound is critical for protecting polymers and coatings from the degrading effects of ultraviolet (UV) radiation, thereby extending product lifespan and maintaining appearance. It is an essential additive for manufacturers in the plastics, paints, and advanced materials industries seeking reliable UV protection solutions.

Application

• Primary use as a light stabilizer (UV absorber) in polyolefins such as polyethylene (PE) and polypropylene (PP).
• Enhancing the weatherability and color retention of automotive coatings, industrial paints, and wood finishes.
• Protecting engineering plastics and synthetic fibers from photodegradation.
• Formulation of agricultural films to improve durability under prolonged sunlight exposure.
• Use in adhesives and sealants to prevent loss of mechanical properties due to UV light.
• Potential application as a stabilizer in cosmetic and personal care products requiring UV protection.

Basic Information

Product Name	2-(5-Chlorobenzotriazol-2-Yl)-4-Methyl-6-tert-Butyl-Phenol
CAS No.	85497-36-5
Molecular Formula	C17H18ClN3O
Molecular Weight	315.80 g/mol
Synonyms	UV-326; 2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole; 5-Chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)-2H-benzotriazole; Bumetrizole; Tinuvin 326; Lowilite 26; 2-(5-Chloro-2H-benzotriazol-2-yl)-4-methyl-6-(tert-butyl)phenol; 2-(3'-tert-Butyl-2'-hydroxy-5'-methylphenyl)-5-chlorobenzotriazole
EINECS	287-043-4

Quality Control

Our production of 2-(5-Chlorobenzotriazol-2-Yl)-4-Methyl-6-tert-Butyl-Phenol adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing all specifications are provided and can be tailored to meet specific customer 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, sparks, and open flame. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Light yellow to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 99.0%
Melting Point	138°C - 142°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 1.0%

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