Description

2-(2H-Benzotriazol-2-Yl)-4,6-Bis(1-Methyl-1-Phenylethyl)Phenol is a high-performance, sterically hindered benzotriazole derivative widely recognized for its exceptional light stabilization properties. This compound is engineered to protect polymers and coatings from the degrading effects of ultraviolet (UV) radiation, thereby extending product lifespan and maintaining aesthetic quality. It is an essential additive for manufacturers in the plastics, coatings, and specialty chemical industries seeking to enhance the durability of their formulations.

Application

• Primary UV absorber and light stabilizer for engineering plastics such as polycarbonate (PC), polyamide (PA), and thermoplastic polyurethane (TPU).
• Critical additive in high-performance coatings, including automotive clear coats, industrial paints, and wood finishes, to prevent yellowing and gloss loss.
• Used in the stabilization of adhesives and sealants to ensure long-term performance under outdoor exposure.
• Formulation component in agricultural films and greenhouse covers to protect both the film and the contents from UV damage.
• Enhances the weatherability of synthetic fibers and textiles used in outdoor applications like awnings and tarpaulins.
• Employed in packaging materials to protect sensitive contents from light-induced degradation.

Basic Information

Product Name	2-(2H-Benzotriazol-2-Yl)-4,6-Bis(1-Methyl-1-Phenylethyl)Phenol
CAS No.	70321-86-7
Molecular Formula	C30H29N3O
Molecular Weight	447.57 g/mol
Synonyms	UV-234; 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol; Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)-; Tinuvin 234; Bumetrizole; 2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)benzotriazole; Light stabilizer 234
EINECS	274-597-4

Quality Control

Our production of 2-(2H-Benzotriazol-2-Yl)-4,6-Bis(1-Methyl-1-Phenylethyl)Phenol adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC and GC to confirm identity, potency, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance protocols.

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 (store away from light).

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Melting Point	137 - 141 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Transmittance	≥ 95% (425 nm) ≥ 97% (500 nm)

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