Description

2-Hydroxy-4-Alk-(7-9)Oxybenzophenone CAS NO 37330-26-0 is a specialized benzophenone derivative belonging to the class of ultraviolet (UV) light absorbers. This compound is engineered to provide exceptional photostability and protection against UV degradation for a wide range of polymeric materials. It is an essential additive for manufacturers seeking to enhance the longevity and performance of their products under sunlight exposure. Key industries that rely on this stabilizer include plastics, coatings, and adhesives.

Application

• Plastic Stabilization: Primary use as a UV absorber in polyolefins (PP, PE), PVC, polycarbonates, and engineering plastics to prevent yellowing, embrittlement, and loss of mechanical properties.
• Protective Coatings & Paints: Incorporated into industrial, automotive, and architectural coatings to shield the underlying substrate and maintain color integrity and gloss.
• Adhesives & Sealants: Enhances the weatherability and durability of adhesive formulations exposed to outdoor conditions.
• Synthetic Fibers & Textiles: Used in the production of UV-resistant fibers for outdoor fabrics, awnings, and geotextiles.
• Agricultural Films: Extends the functional life of greenhouse and mulch films by absorbing harmful UV radiation.
• Packaging Materials: Protects plastic packaging from UV-induced degradation, ensuring product safety and shelf life.

Basic Information

Product Name	2-Hydroxy-4-Alk-(7-9)Oxybenzophenone
CAS No.	37330-26-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	UV-531; 2-Hydroxy-4-n-octoxybenzophenone; Octabenzone; 2-Hydroxy-4-(octyloxy)benzophenone; Chimassorb 81; Cyasorb UV 531; Benzophenone-12; Light Stabilizer 531; 2-Hydroxy-4-(n-octyloxy)benzophenone
EINECS	253-464-6

Quality Control

Our production of 2-Hydroxy-4-Alk-(7-9)Oxybenzophenone adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay, melting point determination, and UV absorbance profiling, to ensure it meets precise specifications for performance and purity. Certificates of Analysis (COA) are provided and available upon request to support your quality assurance and regulatory compliance needs.

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 strong alkalis and incompatible materials. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Light yellow to white crystalline powder
Identification (IR)	Conforms
Melting Point	47 - 49 °C
Assay (HPLC)	≥ 99.0 %
UV Absorbance (λ max)	Conforms
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %

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