Description

Antioxidant Md-697 is a high-performance phenolic antioxidant widely recognized for its exceptional stabilizing properties in polymer systems. Its primary value lies in effectively inhibiting thermal oxidative degradation, thereby significantly extending the service life and maintaining the mechanical properties of sensitive materials. This makes it a critical additive for manufacturers in the plastics, synthetic rubber, and adhesive industries seeking to enhance product durability under demanding conditions.

Application

Antioxidant Md-697 is utilized across various industries to protect materials from oxidative breakdown. Key application areas include:

• Polyolefin Stabilization: Primary antioxidant for polypropylene (PP) and polyethylene (PE) in fibers, films, and molded articles.
• Engineering Plastics: Thermal stabilizer for polymers like polyamide (PA) and polycarbonate (PC) used in automotive and electrical components.
• Synthetic Rubber: Protects styrene-butadiene rubber (SBR), polybutadiene rubber (BR), and other elastomers from aging.
• Adhesives & Sealants: Prevents gelation and maintains viscosity stability in hot-melt and reactive adhesive formulations.
• Thermoplastic Elastomers (TPE): Ensures long-term performance in TPE-O and TPE-S compounds.
• Masterbatch Production: A key active component in antioxidant and additive concentrates for easier compounding.

Basic Information

Product Name	Antioxidant Md-697
CAS No.	70331-94-1
Molecular Formula	C40H58O3
Molecular Weight	586.9 g/mol
Synonyms	2,2'-Methylenebis(6-tert-butyl-4-methylphenol); 2,2'-Methylenebis(6-tert-butyl-p-cresol); Antioxidant 2246; AO-2246; MBMBP; BNX® 2246; Lowinox® 22M46; CAO-14; Ethanox® 2246; Santowhite® PC
EINECS	274-525-8

Quality Control

Our production of Antioxidant Md-697 adheres to stringent quality management protocols. Every batch is tested against comprehensive specifications to ensure consistency, purity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, melting point, and color are provided to guarantee the material meets your specific application requirements and industry standards.

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. Under these conditions, the product maintains its specified properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	124 - 128 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Transmittance (425nm)	≥ 95.0 %
Transmittance (500nm)	≥ 97.0 %

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