Antioxidant 626 CAS 26741-53-7

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CAS:26741-53-7

Purity:98%

Molecular Formula:C33H50O6P2

MW:604.69

EINECS:247-952-5

Antioxidant 626 CAS 26741-53-7 is a white crystalline powder with a melting point of 160-175°C, a flash point of 168°C, and a burning point of 421°C. It is easily soluble in organic solvents such as toluene, methyl chloride, and chloroform, slightly soluble in alcohol, and insoluble in water. Antioxidant 626 is a white to off-white powder with low volatility and higher efficiency. It is often used in combination with hindered phenol antioxidants.

ITEM	STANDARD
Appearance	White pellets or powder
Melting range ℃	170.0-180.0
Volatile content %	≤1.0
Acid Value mgKOH/g	≤1.0
Free 2,4-DTBP %	≤1.0
Purity %	≥96.0
Assay %	≥98.0

Antioxidant 626 is a high-efficiency phosphite antioxidant widely used as a processing stabilizer in polymers and engineering plastics. It provides excellent protection against thermal degradation during high-temperature manufacturing processes and is commonly used together with phenolic antioxidants in advanced polymer systems.

1. Plastics & Engineering Polymers

Antioxidant 626 is suitable for PE, PP, ABS, PVC, polycarbonate, polyester, and engineering plastics. It effectively reduces polymer degradation, discoloration, and viscosity loss during extrusion, injection molding, and recycling processes.

For enhanced long-term thermal stability, it is often combined with Antioxidant 1010 and other Phenolic Antioxidants.

2. Rubber & Elastomers

In rubber processing, Antioxidant 626 helps improve heat resistance and oxidative stability in synthetic rubber, EPDM, elastomers, and thermoplastic elastomer formulations.

3. Adhesives & Coatings

Antioxidant 626 is used in hot melt adhesives, coatings, and sealants to improve processing stability and maintain product performance during long-term storage and thermal exposure.

4. Polymer Recycling

Due to its excellent hydrolysis resistance and processing stabilization performance, Antioxidant 626 is widely used in recycled polymer systems to minimize degradation during repeated thermal processing.

5. Lubricants & Industrial Applications

Antioxidant 626 can also be applied in specialty lubricant formulations together with liquid stabilizers such as Antioxidant 5057 to improve oxidation resistance under high-temperature operating conditions.

Explore more polymer additives on the Unisunchem Home Page or browse the complete Product Catalog.

Excellent processing stabilization performance
Reduces polymer degradation during high-temperature processing
Improves color stability and reduces yellowing
Excellent compatibility with engineering plastics and polymers
High hydrolysis resistance and low volatility
Works synergistically with Antioxidant 1010 and other phenolic antioxidants for long-term stabilization
Suitable for plastics, rubber, coatings, adhesives, and recycled polymers
Reliable global supply from Unisunchem

25kg/bag or Customized according to customer needs

Q1: What is Antioxidant 626 used for?

Antioxidant 626 is mainly used as a phosphite processing stabilizer in plastics, engineering polymers, rubber, coatings, and adhesives to prevent thermal degradation during manufacturing.

Q2: Can Antioxidant 626 be used with phenolic antioxidants?

Yes. Antioxidant 626 is commonly used together with Antioxidant 1010 and other hindered phenolic antioxidants to improve long-term thermal and oxidative stability.

Q3: Is Antioxidant 626 suitable for recycled plastics?

Yes. Antioxidant 626 is widely used in recycled polymer applications because it helps reduce viscosity loss and polymer degradation during repeated thermal processing.