Description

Uv Absorber-928 is a high-performance, benzotriazole-based ultraviolet light stabilizer widely used in polymer protection. This compound is critical for preventing photodegradation, thereby extending the service life and maintaining the aesthetic properties of materials exposed to sunlight. It is an essential additive for manufacturers in the plastics, coatings, and synthetic fiber industries seeking to enhance product durability against UV radiation.

Application

• Primary stabilizer in polyolefins (PP, PE) for automotive parts, outdoor furniture, and agricultural films.
• UV protection for engineering plastics such as polycarbonate, ABS, and nylon used in consumer electronics and construction.
• Enhancing the weatherability of industrial and automotive coatings, including clearcoats and powder coatings.
• Stabilizing synthetic fibers and textiles against color fading and loss of mechanical strength.
• Protective additive in adhesives, sealants, and elastomeric materials.
• Use in packaging materials to prevent UV-induced degradation of contents.

Basic Information

Product Name	Uv Absorber-928
CAS No.	73936-91-1
Molecular Formula	C22H29N3O
Molecular Weight	351.49 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol; UV-928; Bumetrizole; Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)-; Tinuvin 928; Lowilite 92; Benzotriazole UV Absorber 928
EINECS	Contact for details

Quality Control

Our Uv Absorber-928 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 specifications for performance in demanding applications. Certificates of Analysis (COA) documenting purity, melting point, and absorbance characteristics are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 99.0%
Melting Point	138 - 142 °C
Loss on Drying	≤ 0.5%
UV Absorbance (λ max)	Conforms
Ash Content	≤ 0.1%

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