Description

5,5'-Methylenebis(2-Hydroxy-4-Methoxybenzophenone) is a high-performance, light-stabilizing chemical compound designed for advanced material protection. Its core value lies in its exceptional ability to absorb and dissipate harmful ultraviolet (UV) radiation, thereby preventing photodegradation and extending the service life of sensitive formulations. This product is essential for manufacturers in the polymer, coating, and specialty chemical industries who require reliable, long-term UV stabilization for their products.

Application

This UV absorber is utilized across various industries where protection from light-induced degradation is critical.

• Polymer Stabilization: A key additive in plastics and synthetic fibers (e.g., polyolefins, PVC, polyurethanes) to prevent yellowing, embrittlement, and loss of mechanical properties caused by UV exposure.
• High-Performance Coatings & Paints: Incorporated into automotive, industrial, and architectural coatings to maintain color integrity, gloss, and film integrity under harsh sunlight.
• Adhesives and Sealants: Enhances the durability and performance lifespan of adhesive formulations exposed to outdoor conditions.
• Specialty Chemical Intermediates: Serves as a building block or additive in the synthesis of other advanced light-stabilizing agents or functional materials.
• Personal Care Formulations: Used in select sunscreen and cosmetic products requiring broad-spectrum UV absorption (subject to specific regulatory approval and grade).
• Packaging Materials: Protects contents in plastic packaging from UV damage, preserving the quality of light-sensitive goods like food and pharmaceuticals.

Basic Information

Product Name	5,5'-Methylenebis(2-Hydroxy-4-Methoxybenzophenone)
CAS No.	138370-37-3
Molecular Formula	C29H24O8
Molecular Weight	500.5 g/mol
Synonyms	UV Absorber 138370-37-3; Bis(2-hydroxy-4-methoxyphenyl)(5,5'-methylenebis)methanone; 2,2'-Methylenebis(6-methoxy-4-benzofuranone); Light Stabilizer 138370-37-3; 5,5'-Methylenedi-2-hydroxy-4-methoxybenzophenone; Benzophenone, 5,5'-methylenebis[2-hydroxy-4-methoxy-
EINECS	Contact for details

Quality Control

Our production of 5,5'-Methylenebis(2-Hydroxy-4-Methoxybenzophenone) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for UV absorption performance and chemical consistency. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory 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 incompatible materials and sources of heat or ignition. Due to its light-sensitive nature, containers should be kept in opaque packaging or dark storage conditions until use.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	140 - 150 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
UV Absorption (λ max)	Conforms
Heavy Metals (as Pb)	≤ 10 ppm

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