Secondary Antioxidant 626
Basic Information:
Product name: Secondary Antioxidant 626
Chemical name: Bis (2, 4-ditert-butylphenyl) pentaerythritol bisdiphosphite
Synonyms: Secondary Antioxidant 626; 3,9-bis (2,4-di-tert-butylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane
CAS number: 26741-53-7
Molecular formula: C33H50O6P2
Molecular weight: 604.69
EINECS Number: 247-952-5
Structural formula:
Related categories: plastic additives; antioxidant; organic chemical raw materials;
Melting point: 170-180°C
Boiling point: 555.8±50.0°C (Predicted)
Ash content: ≤1.00%
Density: 166 [at 20℃] Density: 166 [at 20℃]
Solubility: easily soluble in toluene, chloromethane, chloroform and other organic solvents, slightly soluble in alcohol, insoluble in water.
Properties: white powder.
LogP: 10.9 at 25℃
| Specification | Unit | Standard |
| Appearance | White powder | |
| Melting point | ℃ | 170.0-180.0 |
| Ash content | % | ≤1.00 |
| Acid value | mgKOH/g | ≤1.00 |
| 2,4-DTBP | % | ≤1.00 |
| Main content | % | ≥95.0 |
Description: Highly effective phosphite - secondary antioxidant
Features: Low volatile, function more efficient, and more use with hindered phenolic antioxidants.
As organic polymer auxiliary antioxidant, low volatility, higher efficiency, mostly with blocked phenol main antioxidant 1010,1076, with good synergistic effect; can be used with benzotriazole ultraviolet absorber and blocked amine photostabilizer in outdoor products;
Applicable to: polyolefin and olefin copolymers, polycarbonate, polyamides and other engineering plastics, rubber and elastomers, coatings and adhesives.
Add amount: 0.05-0.2%, the specific add amount is determined according to the customer application test.
Paceked in 20 Kg / 25 Kg carton / aluminum foil bag.
Or packed as per customers requirements.
Store appropriately in a dry area below 25℃ with a shelf life of two years.
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